To bring some purpose to my lunch break I popped into the Apple store. Unfortunately the high spec iMac was being monoplosied by an old guy.
So I only got to test the latest 1TB iMac 3.2GHz (HDD not hybrid). I opened every app that was in the dock and they all opened within a blink of an eye, with the slight exception of iTunes and iMovie, but still not anything that would bother me. Startup from cold was slow though – I gave up waiting. But that’s a once a month occasion, desktops are usually left to go to sleep in my household. Overall, it was slower to react than my 2011 iMac with a full SSD, but not so slow that you’d notice.
Take from that what you will.