I'm not convinced Lion (or Mountain Lion) is getting a 'huge' pushback from users. I heard isolated groanings on launch from people who didn't like adapting to natural scrolling or the new saving paradigm, but that all disappeared within a few weeks. My friends with Windows 8 on non-touch laptops have, after several weeks, continued to have the opinion that the touch-UI (née Metro) is 'stupid,' and they're not huge nerds either.