Sorry but this last sentence blew my mind a bit... and FYI, I have no pony in this race. So if on average, it is 100% accurate, does that mean it is a 50% accurate way, 75%, or perhaps 92.6%?
Personally, I think the star system is over-hyped and people (fans) spend way too much time worrying about it. Coaches offer players they identify as "good fits" for their programs. They aren't tracking stars on Rivals or Scout and saying, "we gotta have this kid." They already identified that kid by camp, video, referral, etc. Sure star ratings tend to have a correlation between perception and reality (what they do in college and potentially the pros) but there are sooooo many mis-evaluated rankings by all these sites, that you simply cant put too much stock in the number of stars by a kids name.
Point is, debate away all you guys want, but at the end of the day, coaches dont give a rats ass about what Rivals or Scout evals say. I'll take Pitt coaches assessments 7 days a week and twice on Sunday over some Quantitative Mathematics degree holder working for Rivals who won a few fantasy drafts and now considers himself an expert in player evaluation.