I wasn't really into forums back then, were the original DS's sales slow to begin with ?. I thought the DS and Wii both started strongly and continued to get stronger for the first three years.
The DS had an absolutely painful first 10 months. And I do think people tend to ignore and forget this. It would be right around now that the Wii U would have to start turning around to compare to the DS.
- DS was consistently outsold in the first 9-10 months by both the GBA and PSP (depending on area of the world... GBA died quick in Japan).
- DS software was Super Mario 64 DS (launch), Feel the Magic (launch), Yoshi Touch & Go (January), Wario Ware Touched (February), Meteos (June), Kirby Canvas Curse (June), and then August saw Nintendogs, Advance Wars, and Pac 'n Roll. That was literally everything worth playing (plus some random GBA up ports) during those first 10 months. But then it was an avalanche that never stopped with Castlevania, Animal Crossing, Mario Kart, etc. during the 2005 holiday.
- By mid-summer in America PSP actually had more releases under its belt than the DS did despite launching almost five months earlier.
- There was confusion in stores as to how DS software was displayed. People often joked how DS games were mixed in with GBA software. People laughed at DS game cases having GBA cart holders, and how basically it couldn't differentiate itself from the Game Boy line.
- PSP had the first true hit (GTA Liberty City Stories) before DS did, and many people claimed it would kill off DS momentum.
- DS touch screen was called a massive gimmick. Only games that utilized it well were called tech demos (Yoshi Touch and Go). Kirby Canvas Curse was hailed as the only title to really benefit from the touch screen in that first year.
- GBA seeing releases like Pokemon Emerald, Final Fantasy, Pokemon Mystery Dungeon, Banjo-Pilot, Sigma Star Saga, Gunstar Super Heroes, and even the Game Boy Micro made me people think it had a lot more life in it.