So, ever since I got a new MBP 15'' retina and the best available i7 CPU I'm stunned by the performance (of course SSD and 16GB Ram do their part too). And I'm a pro user doing lots of CPU intensive tasks. Been test rendering After Effects projects lately and it's so fast, yet CPU usage seems to be only at about 20%. So if it's not using all it's power & cores I wonder how much more you can throw at it until the CPU usage is maxed out? I have never been able to get it past 20-25%. My old Core2Duo was at almost 100% when I was just watching/ streaming Hulu or some YouTube. Anyone else happy too with i7?