Hmm maybe were having a misunderstanding
I never said the hardware wasn't selling to hardcore gamers. I said the majority of the sales are casuals, which is why a lot of non-nintendo software sold horrible on the DS.
Its the same situations similar to the Wii. That's what happens when you have a casual audience. They buy the system, and 1 or 2 games. Then never touch it again. Casuals bought the DS, Nintendogs, Braintraining, never touched it again. Just like on the Wii how casuals bought Wii/Wii Sports, Wii Play, Wii Fit, and never touched it again.