Has anyone done any performance tests between Snow Leopard, Lion, and Mountain Lion? Both Snow Leopard and Lion seemed like they were quick OSes. They seemed to respond quickly and they weren't memory hogs. Mountain Lion seems quite the contrary to me. I wouldn't call it slow, but at times it seems a little too sluggish. Memory use, compared to the other two is also considerably higher. I was wondering if anywhere on the web there are performance comparisons between these.