It runs fine on my MacBook Pro 13" (early 2011)...to me, it seems that performance is basically the same as iPad (which to me is very smooth), except that its a few program updates behind the iOS versions, so is currently lacking the DLC and still has the older DMD display style. I am looking forward to the updated lighting I prefer fullscreen mode (ctrl+cmd+f), as in windowed mode every so often it does seem to skip a frame or something...fullscreen has no issues.
I think Farsight must mean for that to apply to the non-pro MacBooks...they should update that App store blurb, as I was initially hesitant to buy it as well.