Technically, Okami is right. When we're comparing
sales points (not preorder points) with actual sales, a more accurate statement would be that 1 Comgnet sale point = 500-600 copies on average, historically; it also depends on the kind of game. Still, while I didn't give a detailed look, the Comgn preorders / actual sales ratio has generally diminished in the past few years, even considerably so, and I wouldn't be surprised if the same is happening for the Comg sales/actual sales one as well.
However, as I already pointed out, several Switch items ended up with more preorder points than sales points, which usually translates into stock problems / incapacity of fulfilling preorders.
Also, I've checked what happened at the past launches and I found out that...Comgnet's extremely guilty in this department.
3DS
Final Comgnet preorder day
[3DS] Professor Layton and the Mask of Miracles - 189pt
[3DS] Super Street Fighter IV 3D Edition - 61pt
[3DS] Samurai Warriors Chronicles - 58pt
[3DS] Nintendogs + Cats: Golden Retrivier & New Friends - 40pt*
[3DS] Ridge Racer 3D - 37pt
[3DS] Pro Evolution Soccer 3D - 32pt
Comgnet weekly sales
[3DS] Professor Layton and the miracle mask - 139pt
[3DS] Samurai Warriors Chronicle - 80pt
[3DS] Super Street Fighter IV 3D EDITION - 67pt
[3DS] Ridge Racer 3D - 39pt
[3DS] nintendogs cats toy poodle & New Friends - 36pt*
Actual first week sales (Media Create)
03. / 00. [3DS] Professor Layton and the Mask of Miracle (Level 5) {2011.02.26} - 119.591 / NEW
05. / 00. [3DS] Nintendogs + Cats (French Bulldog, Shiba, Toy Poodle & New Friends) (Nintendo) {2011.02.26} - 64.213 / NEW *
06. / 00. [3DS] Samurai Warriors: Chronicles (Koei Tecmo) {2011.02.26} - 49.327 / NEW
07. / 00. [3DS] Super Street Fighter IV: 3D Edition (Capcom) {2011.02.26} - 44.649 / NEW
08. / 00. [3DS] Ridge Racer 3D (Bandai Namco) {2011.02.26} - 38.226 / NEW
15. / 00. [3DS] Winning Eleven 3DSoccer (Konami) {2011.02.26} - 24.556 / NEW
*preorders and weekly Comgnet sales based on separated SKUs, while MC sales are combined
PSV
Final Comgnet preorder day
[PSV] Hot Shots Golf 6 - 59pt
[PSV] Uncharted: Golden Abyss - 45pt
[PSV] Disgaea 3: Absence of Detention - 34pt
[PSV] Dynasty Warriors Next - 33pt
Comgnet weekly sales
[PSV]Minna no GOLF6 – 68pt
[PSV]Uncharted: – 54pt
every other Vita title lower / at 42pt at max
Actual first week sales
07./00. [PSV] Hot Shots Golf: World Invitational <SPT> (Sony Computer Entertainment) {2011.12.17} (¥4.980) - 61.412 / NEW
08./00. [PSV] Uncharted: Golden Abyss <ADV> (Sony Computer Entertainment) {2011.12.17} (¥5.980) - 48.224 / NEW
18./00. [PSV] Dynasty Warriors Next <ACT> (Koei Tecmo) {2011.12.17} (¥6.090) - 29.181 / NEW
19./00. [PSV] Lord of Apocalypse <RPG> (Square Enix) {2011.12.17} (¥5.980) - 28.742 / NEW
WIU
Final comgnet preorder day
[WIU] New Super Mario Bros. U - 200pt
[WIU] Monster Hunter 3G HD Version - 75pt*
[WIU] Nintendo Land - 54pt
Comgnet weekly sales
[WIU] New Super Mario Bros. U - 138Pt
[WIU] Monster Hunter 3G HD Ver. - 58Pt*
[WIU] Nintendo Land - 57Pt
[WIU] ZombieU (zombie U) - 16pt
Actual first week sales (Media Create)
02./00. [WIU] New Super Mario Bros. U <ACT> (Nintendo) {2012.12.08} (¥5.985) - 163.528 / NEW
04./00. [WIU] Monster Hunter 3 Ultimate # <ACT> (Capcom) {2012.12.08} (¥4.800) - 106.388 / NEW*
06./00. [WIU] Nintendo Land <ETC> (Nintendo) {2012.12.08} (¥4.935) - 72.121 / NEW
15./00. [WIU] ZombiU <ACT> (Ubisoft) {2012.12.08} (¥6.980) - 13.000 / NEW
* Comgnet probably did not include bundle preorders in their own points
PS4
Final Comgnet preorder day
[PS4] Yakuza: Ishin! - 80pt
[PS4] Battlefield 4 - 35pt
[PS4] Killzone: Shadow Fall - 21pt
Comgnet weekly sales
[PS4] Yakuza Ishin! - 111pt
[PS4] Battlefield 4 - 54pt
[PS4] Killzone Shadow Fall - 42pt
[PS4] Dynasty Warriors 7 - 26pt
[PS4] Assassin's Creed 4 Black Flag - 21pt
[PS4] Call of Duty Ghosts - 18pt
[PS4] Tomb Raider Definitive Edition - 15pt
Actual first week sales (Media Create)
03./00. [PS4] Yakuza: Ishin! <ADV> (Sega) {2014.02.22} (¥8.600) - 82.540 / NEW
07./00. [PS4] Killzone: Shadow Fall <ACT> (Sony Computer Entertainment) {2014.02.22} (¥7.245) - 32.336 / NEW
08./00. [PS4] Battlefield 4 <ACT> (Electronic Arts) {2014.02.22} (¥7.665) - 24.799 / NEW
11./00. [PS4] Dynasty Warriors 8 with Xtreme Legends <ACT> (Koei Tecmo) {2014.02.22} (¥8.190) - 14.356 / NEW
13./00. [PS4] Assassin's Creed IV: Black Flag <ACT> (Ubisoft) {2014.02.22} (¥8.820) - 13.862 / NEW
14./00. [PS4] Call of Duty: Ghosts - Dubbed Edition <ACT> (Square Enix) {2014.02.22} (¥7.980) - 13.701 / NEW
15./00. [PS4] Tomb Raider: Definitive Edition <ADV> (Square Enix) {2014.02.22} (¥4.800) - 12.093 / NEW
18./00. [PS4] FIFA 14 <SPT> (Electronic Arts) {2014.02.22} (¥7.665) - 8.808 / NEW
SWI
Final Comgnet preorder day
[SWI] The Legend of Zelda: Breath of the Wild - 205pt
[SWI] 1 2 Switch - 136pt
[SWI] The Legend of Zelda: Breath of the Wild (LE) - 63pt
[SWI] Super Bomberman R - 32pt
[SWI] Dragon Quest Heroes I-II for Nintendo Switch - 30pt
Comgnet weekly sales
[SWI] The Legend of Zelda: Breath of the Wild - 202
[SWI] 1 2 Switch - 133
[SWI] The Legend of Zelda: Breath of the Wild (Collector's Edition) - 56
[SWI] Super Bomberman R - 40
[SWI] Dragon Quest Heroes I & II for Nintendo Switch - 27
[SWI] Puyo Puyo Tetris S - 14
Actual first week sales (Media Create)