What is often overlooked

Those benchmarks compare Wine NTSYNC against upstream vanilla Wine, which means there’s no fsync or esync either. Gamers who use fsync are not going to see such a leap in performance in most games.

Ntsync is great and there will be performance improvement. But not exactly massive

I remember hearing that Ntsync isn’t even faster than fsync in general use, just in some rare corner cases

This is true and expected, the point of NTSYNC was to be a more faithful emulation of Windows synchronization primitives, so increased compatibility and correctness. If it’s ever faster than esync or fsync it’s just a bonus. It’s on par generally, though.

Wine Is Not an Emulator.