Retina MacBook Pro gaming performance reduced after 10.8.2/EFI update, are you having the same issue?

So after updating my rMBP to 10.8.2 and applying the EFI update I started up TF2 and noticed greatly reduced performance (200fps -> 30fps). Has anyone noticed similar issues with their Macs after updating? If so have you managed to fix them?

Other users reporting the issue:

[Note: tried an SMC reset, not working for tf2 at least]