In one of those games, Nieman was losing by 1.3 points in the first 10 moves despite being 100% according to this analysis so I'll take it with a grain of salt. This only looks at having moves within the top 3 engine moves done by one of the engines tested, and sometimes there's just 1-2 good moves so doing 1 out of 10 (or whatever) possible moves doesn't mean you did anything good. Further, it's unclear how cherry-picked it is. If it was that obvious I'd think the other analysis would've caught it which they didn't.
You can find more discussion of it on reddit, but the threads are generally all over the place.
https://www.reddit.com/r/chess/comments/xofl99/one_of_the_10...