I don't really think this is actually process invariant if the limiting factor is thermal, rather then purely a signal propagation delay.
Thermals are a power issue. I've been pretty clear and up-front about the fact that this metric does not account for power consumption in any way.
I mean, Avalon chips ship at 300Mhz, but are known to run at 450 and theoretically even more if it were only a transistor transition time.
I don't list theoretical results.
If Avalon are willing to stake their reputation on a public claim that their product provides 450mh/s with heroic cooling, and a third party verifies that using a few randomly chosen chips, I'll list them at 450mh/s.