This was precisely the case with my DD. I remember watching one of your videos and feeling vindicated because I couldn't understand why her coach was bothering with a rollover. She threw drop balls unintentionally all the time when she released a little early.What I have seen 2 million times (maybe 3 million?) is that young pitchers: 9, 10, 11 years old who can throw legit drop balls without even realizing they are doing it. The ones taught to throw a "fastball" are basically being taught a drop and they don't realize it. 99.99999% of those pitchers' have a parent who say yes when I ask, "Does the fastball drop when you're catching for her?" So, bingo they're throwing a drop already. But, to admit that, a pitching coach will be losing money because most will complicate the drop, tell them they need to do all kinds of crazy things when throwing this pitch (stepping short, leaning forward, turn the hand over after release etc. etc.) trying to make the "fastball" and drop into 2 separate pitches. If the admit that, then they won't have 5 months worth of lessons teaching them the drop and all the crazy things they need to do to make the pitch happen.