I will say, if yours does overheat, let Apple know immediately.
You probably won't have a problem at all, mine is now getting to 70C when playing WoW, so I am pretty happy with that.
Will try encoding a video now to see what it maxes out at.
EDIT - It got to 92C and sat there.
Fan maxed out and brought it back down to about 42 in a matter of seconds.