Of course, there are those of us who don't just whine about GNOME 3, but simply stop using it when things break beyond acceptable limits (200%+ CPU usage, anyone?), and there were no response on bug reports.
I must say I'm surprised to end up in this camp. I've been running the GNOME Shell previews since the first day they came out, and even stomached Fedora on my netbook being obviously more sluggish than a colleague's netbook (running Ubuntu, at the time presumably with Unity2D)... my eyes got opened when switching to XFCE dramatically improved performance and battery life.
(using Intel HD on-board graphics, in case you're wondering. I bought the rationale of making full use of graphical acceleration etc., but after years, surely it's not unreasonable to expect an *Intel* card to work just fine).