I just got my mbp. And the trackpad is acting kinda weird.
It's like it goes to sleep. a lot of the times then im going to click a link i have to click it two times because the first click does nothing.
Try using tap to click. It may solve your problem.
I also have the 2011 13", and I find the click usable only when precision is required, for clicking links and such, I find the tap to click option more suitable.