I gotta agree with you on hating PSP fanboys.
I own only a PSP for its functionality (it's a MP3 player, video player, picture viewer, etc...), as well as for playing games.
Had I more money I'd likely have purchased a DS by now.
But while PSP fanboys say dumber things more often, I find that DS fanboys pull out a lot of either cliched/stupid terms or skip the argument and get straight to the hatred.
The most used cliche would be "I'm loyal to the Big N", which earns the speaker the right to get shot.
I've noticed that often the fallbacks go to defenses like it having Mario, the greatness of the touch screen, and the PSP's once lack of good games (which it still lacks to a some degree)