The PS3 has been getting this crap for a long time, I'm getting a flashback from it all. I've heard people say "Will InFamous/God of War/LittleBigPlanet/Heavy Rain/Ratchet and Clank/Uncharted/etc... go to Xbox?" while simultaneously going "there's no good PS3 exclusives!" (back then anyway, now not as much), and of course the answer is "NO" because they're all owned by Sony. And then people complain about it, going about, saying "I hate exclusives!" and all that crap.
If there's a game that's exclusive to a platform that you want, don't complain until it comes to your platform. You made your choice in buying your respective platform, the developers made their choice, either you buy the hardware or, to put it bluntly, piss off.
There's nothing wrong with staying exclusive, and I applaud Jaffe for defending his position. I wouldn't want Bungie to port Halo to PS3, not because it's a bad game or anything, but because it's a Microsoft brand anyway. If Bungie decided to port it, or go multiplatform (which they did, but that's beside the point), then more power to them. Same thing with Insomniac, which has recently gone with EA partners I think, more power to them if they can get their games on more platforms if they desire.