[cpgxiii]

"Base" clock dropped, but boost clocks remained fairly high. In practice performance gains were quite good (except, notably, for that time when Apple used old power control firmware and had 6C/12T processors underperform their 4C/8T predecessors).

The point of this is that the significant improvement from Kaby Lake to Whiskey Lake involved only small architectural refinement and updates to an existing process, so much larger performance/power improvements should absolutely be expected from an entirely new process plus architecture refinement.