Here's the 13.3 rMBP https://www.youtube.com/watch?v=wLeoyvvAX14
Here's the 12" rMB
https://www.youtube.com/watch?v=U-ea9xPATWg
I'm not all that great at the youtube, so not sure if I did this correctly.
Well according to your videos there's no lag at all (which is awesome) do you have the 1.1 or 1.2? And could you try it with more spaces/mission control? If it's not too much trouble!