I can't speak to which slider threads are "major," but I've definitely seen high thresholds pop up in a couple of popular threads. I know charter's has been high before, Flazko uses 90 in his personal set, etc. No idea who is at what right now. EDIT: As for game developers, they balance the game so that you'll get a realistic score running 5 min quarters. Meaning, all offense all the time forever & ever. 50 or lower threshold is a great way to make the game more offensive, frankly. When I say realism I'm talking about having the gameplay itself actually become more realistic. Geared for 115-125 snaps instead of 40-50.
You can objectively measure in-game player speed down the field vs NFL players down the field. How long it takes them to get 30, 60 yds for instance.
You can compare average DB 40 times with average OL 40 times and objectively measure what the distance gap is IRL vs in-game. Do that and the evidence becomes crystal clear. I haven't even mentioned the eyeball test, which high threshold wins with ease, or the balance, where high threshold is one of the key ways to allow man coverage to function effectively.
I can't speak to feel or what guys find more fun. Plenty of people find WRs getting wide open to feel great and be tons of fun. Plenty of people want fast WRs to fly by any DB who is a few points slower. As if Richard Sherman or prime Revis, neither of which was a burner, didn't line up near the LOS on a regular basis. The fact is, the difference between 95 SPD and 88 SPD, if you were to translate the 40 times to distance, is far less than low threshold advocates think. In reality NFL WRs never just run by their man by 5-10 yards due to pure speed alone. Clowney ran literally step for step with Amari Cooper (4.42 spd) and has run down WRs from behind in-game. If low threshold leads to a simpler style of play where guys enjoy how wide open their guys get, more power to them. I don't judge what people find fun or what "feels" better to them.
But if you want something closer to realism, it's high threshold plain & simple, and it's tough to make an objective argument to the contrary.