I think it is an incredible resource and no respectable coach is going to contact a pitcher who makes velo claims without reputable equipment verification (as flatground already stated). My only problem is when young players post and ask for advice. As I have learned in a very short period of time, there is far more poor coaching advice then good. If your son (pitcher) decides to post and starts receiving advice, please be careful. I am in the process of correcting a lot of bad coaching with our HS pitchers. It is frustrating because there are coaches on staff who will contradict my work (not intentionally) but because they want to help. Problem is they are making my job tougher! 
On side note, when I first started following recently, the first pitcher I saw was LHP who was picked up by the Rangers. Same organization that a good friend/mentor had recently been hired by as PC. He said they found him on twitter then had a scout/s visit and see him throw live.
Thanks for helping players achieve their dreams flatground!