If they are on A12900k/3090 systems, those are either matching or outperforming the highest end Ultra. Whilest consuming more power ofcourse, but its not like they can do away everything else they do (rendering, gaming etc etc) in favour of select performance improvements.Maybe the DSP's/hw accelerators could mean something, but those are present on 3090's aswell in different forms.
I hope
@Dictator can chime in.
Btw, in Xcode the m1 ultra is very far away from doubling M1 max performance. Wasnt this supposed to be linear, due to it being basically seen as a single chip? Software optimizations should have little to do with that.