Alright, before this poo-storm really gets started:
I know it's a rather redunkulous download (being a 1:20:37 long MP3 file), but this explains the collision model ENTIRELY in all sorts of ways directly from the Man himself. If you still think collisions are unfair after hearing this, you need a hole bored through your head.

It also explains some other various lag "issues." I find them very interesting to listen to once in a while, though there are three episodes.
Link, ~37MB
I'm sure those who are adamant that it suxors and that it's out to get them will keep their tinfoil hats pointed in that link's direction, but maybe it will clear a few people's heads.