Why does the Mac Pro have a "fan startup surge"? My MacBook Pro doesn't, the system comes up with the fans at 2000rpm (idle). Since this thing goes from silent at 2000rpm to F22 takeoff at 6200rpm, I'm sure I'm not hearing things. I guess a better question would be why the MBP doesn't...Is it just the GPU fan that does that, or do the case fans do it too?