Well, I never noticed the aiming acceleration thing, but I haven't exactly played many PS3 games. I still say in a comparison of physical controllers, I much prefer the dual shock to the xbox controllers. The shoulder buttons are better, the L3 and R3 buttons are better, the buttons aren't domed (that pisses me off a lot) and the triggers have less travel distance.
I am inclined to agree about how keyboard are awkward, but I don't know if I can agree that the wii is the best aiming scheme. Maybe the wiimote is the best aiming scheme, but I would never say that the wii controller is the best FPS controller, simply because the whole wiimote + nunchuck thing is awkward to me. I don't like having 2 things that move around like that.
And I only said PC FPS is the only way to go because I enjoy being able to turn on a dime like that. I hate technical limitations getting in the way of things, because on a console, you either have low sensitivity, so you can aim accurately, and then have trouble moving around because the fucking turning is slow, or you set it high so you can get around, and have a hell of a time lining a shot up correctly because you try to barely move and you jump to the other side of the target.