I usually don't agree with anything Sony ever does since they're big, rich, and evil... but I do like my PS3 a lot. As a satisfied customer, this trashing talking is wholly unnecessary. Ever heard of being humble? Oh wait, that's Nintendo's angle.
Sony likes to take the old "Sega" approach when it comes to talking about the competition. Talk shit on them up and down regardless of how good/bad they're doing. (Remember "Genesis does what Nintendon't" ?)
There is some truth to what he's saying though. You rarely see a lot third-party IP's do outstanding on the Wii. It always comes down to what Nintendo churns out themselves. More times than not, a lot of those titles end up on the PSP or as downloadable content on PSN or XBL. They seem to be more appealing to those audiences too. I think maybe Nintendo's emphasis on catering to the casual and non-gamers will come back to bite them in the ass soon.
Don't get me wrong, I love Nintendo, but their first-party core game offerings are sparse as always... maybe even more so. They are, however, the sole reason anyone should own a Nintendo console though.
This whole scenario in the current-gen console war really reminds me a lot of the Nintendo 64 Vs. Sega Saturn, Vs. PlayStation 1. Nintendo reprises their role as usual, the role of the PS1 is now portrayed by the Xbox 360, and the PS3 is playing the part of the Sega Saturn.
The parallels don't stop there, the PS3 and Saturn share a lot of similar quirks. Both require extra care and attention from developers as they are/were hard to program for, the system exclusives tend/tended to be the best titles for them, and both are/were more popular in Japan than America and Europe.