That's certainly been the impression I've been left with.5ghz all core 16 cores??..no one ever suggested that did they??
I'm sure it's just one group going "hey, lots of cores" and another group going "high speed awesome GloFo-ness" and another group going "and more IPC, lower IF latency, and wider vector units". All of these things are not going to come to pass. Not at the same time.