(I think you mistook me for xmonkey, the claim with fastest CPUs was mine).
At this point, I might try to wiggle my way out of this by saying, well, the 6X70HQ CPUs actually have slightly lower turbo-boost clocks and are also less likely to maintain their clocks under load due to beefy GPU, to which you could respond with the point of the L4 cache, but lets not do all that.
Sure, my claim was a bit careless. Anyway, because the 6X70HQ series are virtually absent from the market, save for some very very rare confugurations, I have basically dismissed them as vapourware. Let me rephrase my statement in a following way: Apple is using the fastest mobile consumer CPUs that is currently shipping in substantial quantities across configurations in comparable laptop categories (as in: fastest current actually shipping in bulk CPUs).