That’s exactly what I took when I watched the presentation live.I suppose it is possible that in the chart displayed in this article, Apple is saying an M1 Ultra at ~100 watts matches a 3090 at ~300 watts. However, pushing the 3090 to it's near-500W maximum would allow it to pull significantly ahead as the benchmarks run by The Verge showed.
Apple clearly did slight of hand and knew they’d generate headlines with the case that their cpu/gpu out paces a discrete $2k gpu just that it doesn’t as the nvidia part gets much more performance by chewing more electric.
Apple did stress multiple times that their part did more work at less watts and was keen to stress what work loads their part could go to, 16 x 8k streams etc etc.
2 things are crystal clear
1: Apple are benchmarking against the discrete market with their imbedded gpu
2: Apple stated the Mac Pro is still to come