I think I have to agree with PGStaff. I saw one or two scouts at our son's high school games last year. True, he was a junior, but I don't think that many people knew about him either.
Then, he went to some PG and other events this summer and by the end of the summer was ranked high on the PG and T1 lists. Now, scouts are calling the house all the time...want to meet, questionnaires, psychological tests, etc...
Why did they start calling? Could be a lot of things including word-of-mouth and some of the events they saw him at this past summer. But the amount of attention he is getting leads me to believe that the lists have at least something to do with it too.
Ultimately, they (like the colleges) will make their own assessment based on evaluating him this coming Spring, but SOMETHING put him on their radar screens. And it wasn't the high school he plays at.