I'm not sure I understand. I've heard Trials and Shadow Complex talked about on the 360 side of the ledger since I re-entered the world of console gaming. After that, it was Castle Crashers, and Limbo got a massive amount of hype. I even heard people saying Limbo should be nominated for GotY. I don't think that anyone would deny that XBLA games are a large amount of the 360's draw, perhaps more than the mainstream games to some people.
In that context, I don't see why anyone would mind that PSN games are getting buzz now. The key point is that these games get hyped, not because they're on XBLA or PSN, but because they are QUALITY GAMES that a lot of people have enjoyed. As a big fan of smaller, downloadable games, I'm glad to see them get recognition, no matter where they are released.