i really really prefer my mac trackpad over a traditional trackpad with two buttons below it. people say the mac trackpads suck for gaming, but they're much better than the average trackpad. Trackpads suck at gaming in general, imo. I whip out my mouse when playing any fps, but on my mom's pc I whip out my mouse to play anything.
Basically the same thing.
2 fingers = 1 Right click. I find it kick ass for gaming since it's like clicking on air, it's so easy.
Allows for sharper reflexes. Also, I've been playing TF2 on a macbook for 3 weeks.