Sluggish animations...sometimes

Hi all,

I've noticed that my new 2016 rMacBook stutters while performing animations from time to time. Other times, they just work like butter. It's not very deterministic but it's extremely easy to reproduce nevertheless. When it happens, usually repeating the animation a few times makes it work properly again, as if the GPU had to "warm up". I'm referring to things like switching between two full screen apps, opening Mission Control, or even scrolling in Safari.

I've found references to the same problem in other macs (even MacBook Pros), sometimes even involving constant lag, which is not my case; I'm wondering whether this is a common issue with retina Macs (which I've never had before) or if there's something wrong in particular with my device. If the former, I'd also like to know if there's anything that can be done to make it a bit better (and that doesn't involve disabling transparencies altogether, since it looks ugly as hell).

Thanks in advance!