I also "know" where to get the best country fried steak in town, but unless they enter into a competition, it will always just be my word against whoever else's
Same with this, unless they run in the 1/4 mile, the established test for straight line acceleration for the better part of a century, it will always be their word, and nothing more
It's kinda like being the best team in the WNBA...close, but not quite the same