In case you were wondering, the highest-end computer they're comparing it to is a $6000 W6900X in a 12-core Mac Pro. It's just about the best GPU you can equip a Mac Pro with, but also admittedly a ways off from the fastest consumer hardware.
The W6900X/6900XT is basically tied with the 3090 as the fastest consumer GPU. A $10,000 A100 is faster but I don't think it even has any monitor outputs.
As far as I can tell, the "12 core Mac Pro" is a Intel
W-3235. Thats a 2019 processor that isn't even particularly impressive by Intel's current standards - the current Xeon W line goes up to 38 cores, has faster memory, PCIe 4 vs 3, etc.
The whole twitter thread is about utilizing the GPU and the GPU scores are what's important.
It will be interesting to see what these tests look like when Apple updates the Mac Pro with Apple Silicon. The rumors have the GPU having 2x and 4x more than the top end M1 Max SOC.
All I'll say is that it would be genuinely unprecedented if they could make that work. The M1 is impressive, but it's family of CPUs were a technical inevitability. ARM has notorious scaling issues, so I'm greatly interested to see if they bruteforce it or go a more tactical route.
What? The ISA is basically completely orthogonal to multicore scaling.
The GPU designs in Apple chips has nothing to do with ARM, so even if we accepted that "ARM has notorious scaling issues" (a confusing claim, but even if we took the most generous route and assumed it meant "vendors using ARM have scaling issues" -- also not true) it is orthogonal.