Possibly the the ability to evaluate situations in thin slices is what makes one great? Mayhaps that is the point?
Sure, but the inference is that one can take a glance at a situation and perceive the whole. Which IMO is BS and gives the perceiver some kind of power that isn't really there.
Think about things you're well-above-average at. Do you have some kind of power? Or are you just experienced and comfortable with whatever gotchas might arise?
And I wanna see statistics on that tennis coach who can predict double-faults. You know, with math and stuff. I want to see how he does observing good players, bad players, men, women, people he's seen for a while and people he's never seen.
Circling around to ASL, of course Great Players are great. They could kick my butt. But I'm not getting all cross-eyed about how they must process information on some 10th dimensional plane that I can't even comprehend.