this stinks (Score 1)

really. They claim significant improvements in GUI responsiveness and admit to not knowing how much MAc users were suffering before which is kind of stupid because Macs were awfully slow for anybody even half objective. I don't think this has much to go with GHz, Apple tends to overabstract their system software which has tremendous consequences performance wise. Take their text handling framework, nicely abstracted, robust but slow like molasses. Same with everything else. Unless they start hand tuning code on system level with view toward efficiency not abstraction don't expect any realistic CPU to be able to handle their stuff competently.