PostmanPot
Honorary Master
Just on the subject of frame rates, I don't consider 30fps very good.
Starcraft 2 1280x720 medium texture settings core i5-3570K 29.3 FPS
Scroll down about half way.
http://www.expreview.com/18483.html
30 FPS is perfect for most. Also, Iris graphics is much better than HD 4000. Also, I'd think overheads are different between Windows and Mac, so not the best way to compare. Lastly, pro players play on low.