The jump from Xbox One, 1.4 teraflops, to Series X, 12 teraflops, is 10.6 so as long as the next one is 23 teraflops it will be the largest jump ever. It’s easy when you manipulate the numbers.
The 4090 is around 100 teraflops so even if it’s a quarter as powerful as that they can claim success.
The same size jump (8.5x) would land at 100 teraflops, not 23.
It’s relative, not linear.