Probably EA expected more of Dead Space and Mirror's Edge, but they sold a lot more in PS360 than it will sell on Wii.
The problem of the Wii is that, even if they have a big userbase, the hardcore userbase is smaller.
You can't think that a game like Dead Space Extraction will sell more than 360 Dead Space, for example, only because the userbase of Wii is bigger than the 360 one.
Of the 21m Wii, probably there is only 4m interested in hardcore games, that makes the practical userbase less than the 360 or even the PS3 one.
And another problem is that a lot of this Wii hardcore userbase uses piracy, so a game like Dead Space Extraction is more pirated than a Wii Fit + or a EA Sports Active.
For the PSP, if Sony can't stop the CFW, it will be dead. I don't want to criminalize the GAF CFW users (i even have a CFW) but, like PJM director said, a few people buy the game, but a lot of people play it, even online. And the people that uses CFW legally can't buy the game because if they upgrade, they loose the CFW legal features. Even when the CFW was up to date, and everybody was able to buy and play the newest games, nearly all the games bombed, specially in US-EU, but gamefaqs and other forums were full of people that had the game.
I bought a Go, and PJM, but if CFW continues (in a way that we can easily, not only play emulators, also games), we'll kill the golden egg goose.