It depends on what audience.
Nintendo never really lost the "traditional" gamer audience since the DS and 3DS in the west because the portable gamer is mainly the same type of gamer that made the previous portable systems successful, except with a influx of gamers that liked more Eastern gaming. In a way they obviously picked up a few that never had portables but might have been fans of one of the previous console generations seeing sequels or remakes/ports of favorites appear on it.
In Japan the situation is mixed, they are getting some of their normal audiences, plus a good clip of portable fans that were supports of the PSP because the system allows for similar gaming experiences in adventure/visual novel and RPGs. However, according to sales, they are still having trouble getting some of the PSP base that may be Sony loyalists, hence why the PSP and Vita are still getting a lot of games that could easily be on the 3DS. This may be because some developers are infact still loyal to Sony or just don't want to use stronger hardware since the main reason they started developing for the PSP was because it allowed them to use PS2 development tools and cut costs.
Either way, Nintendo is getting some added pull but most of the success is still coming from the same types of gamers that liked GBA/DS games.







