Aah, you're right, I missed that. Thanks
So AMD just released the full numbers used in the presentation (
here).
Someone on reddit collated all of the numbers and calculated the averages:
6900XT is 3.1% faster than 3090 at 4K.
6900XT is 7.3% faster than 3090 at 1440P.
6800XT is 4.8% faster than 3080 at 4K.
6800XT is 9.3% faster than 3080 at 1440P.
6800 is 15.3% faster than 2080 Ti at 4K.
6800 is 19.3% faster than 2080 Ti at 1440P.
Now all of these numbers are with SAM and possibly also Rage on (the page only mentions SAM), so without those the numbers would probably look something like this (assuming 5% average boost from SAM and Rage):
6900XT is 1.9% slower than 3090 at 4K.
6900XT is 2.2% faster than 3090 at 1440P.
6800XT is 0.2% slower than 3080 at 4K.
6800XT is 4.1% faster than 3080 at 1440P.
6800 is 9.8% faster than 2080 Ti at 4K.
6800 is 13.6% faster than 2080 Ti at 1440P.
If we furthermore apply the suggested 2.5% to the Nvidia results to account for cherrypicked benches, then we get the following:
6900XT is 4.2% slower than 3090 at 4K.
6900XT is 0.3% slower than 3090 at 1440P.
6800XT is 2.7% slower than 3080 at 4K.
6800XT is 1.6% faster than 3080 at 1440P.
6800 is 7.1% faster than 2080 Ti at 4K.
6800 is 10.8% faster than 2080 Ti at 1440P.