Average of what? A full play through? Select scenes? The most taxing scenes? I think it was nxgamer that Global linked some stats for frame percentile, and that was pretty nice, but scene selection will still play a big part in the end results. Not to mention it's very hard to play a scene in exactly the same way on each console to make sure the results are comparable.
Ultimately, I don't really understand what there is to even argue about. Both consoles turn in good results and one happens to have 50% more ALU and more bandwidth. If the PS4 Pro ran locked at 1440p, you'd expect the Xbox One X to run at something like 1620p, assuming the game is ALU bottlenecked. Looks like it met or exceeded those expectations.
Ultimately, I don't really understand what there is to even argue about. Both consoles turn in good results and one happens to have 50% more ALU and more bandwidth. If the PS4 Pro ran locked at 1440p, you'd expect the Xbox One X to run at something like 1620p, assuming the game is ALU bottlenecked. Looks like it met or exceeded those expectations.