Just now seeing the numbers, I'm surprised Halo 5 made it to #1 considering the damaged Xbox brand from the awful launch plus the damaged Halo brand from Halo 4 and Halo MCC. Yeah, it's not as high a debut as Halo 3, but that shouldn't be surprising to anyone if you remember how the 360 was riding a wave of momentum on a lot of awesome releases 2006-2007 while the PS3 was not doing so hot. Something had to give with the roles reversed this time.
Personally, I haven't bought it yet despite all the positive impressions. I have two good friends that used to love Halo, we were there day-one for every Halo release, but we haven't bought this one yet. Probably soon, but it's not a priority like it used to be. I think MS needs a new IP, or they try to revive Perfect Dark again (no Rare this time, pls).
Awesome to see Yoshi chart, too. : D