Short Answer: No
There is a reason Bryce Harper was on every poster and billboard even when he was hitting .220 in June. It's not about promoting the best, it's about promoting those perceived to be the best. Harper had a down year, he's obviously a very good player. Maybe these kids are good, but had a down showcase, I don't know.
Everybody is guilty of it. PBR has players ranked in their top 50 that might not be the best player in their town. PG has scout write-ups of guys who couldn't get out of the 2nd inning but touched 92 once. But a player/the parent of a young player will look at the rankings/tweets see something they perceive to be good and sign up for a showcase/tournament because that it what they think they need to do.
We have a player on our team committed to a top D1 program. He's big and throws hard, but couldn't record an out in a start down in Georgia. PG still had a nice writeup about him and his 94mph fastball as one of their Top Daily Performers. A friend of ours went to a PBR showcase. He said the "top prospect" they had been touting all over their site and twitter did not put a ball out of the IF.
It's all for clicks, likes, which lead to money which is what it's all about. A lot of the time they are pretty good at identifying good players and get it right. They're also wrong a good amount. But the sooner you stop worrying about rankings, tweets, and the easier your life will get. The only thing that matters is your son getting in contact with the right schools and coaches.