I should branch out on these forums, since I only seem to post in Mac threads, but for what it's worth, I just noticed this new client last night. Had to re-download and re-install, but wow, what a difference. Huge leaps over the last time I tried it, which itself was a much better version than we had in June. For me, I'm seeing performance on par with the Windows client, with the only stutters right now when I'm running through a crowded city. But that can happen in Windows too.

For reference, I have a late 2012 iMac 27", 3.2 GHz i5, 24GB RAM, GeForce GTX 680MX (2GB), running 10.11.4.