I saw a post from someone the other day asking about the breakdown of percentage of players with particular star ratings drafted, and I recalled an Atlantic article on the topic. I found the article with the school by school data for P5 but not the collective numbers (if someone has them, please post - thanks). In general, for the 10 or so years the Atlantic examined data the breakdown was around the following:
5 stars: ~60% drafted
4 stars: ~ 20% drafted
3 stars: less than 10% (closer to 5% I believe) drafted
Notably, top recruiting schools tended to have more like 15% of their 3 stars drafted, which is probably due to them mostly getting high 3 star guys. There are so many 3 stars that there is a big range with those guys.
At any rate, the data shows a significant correlation between recruiting ranking and odds of being drafted, though the ratings are far from perfect.
5 stars: ~60% drafted
4 stars: ~ 20% drafted
3 stars: less than 10% (closer to 5% I believe) drafted
Notably, top recruiting schools tended to have more like 15% of their 3 stars drafted, which is probably due to them mostly getting high 3 star guys. There are so many 3 stars that there is a big range with those guys.
At any rate, the data shows a significant correlation between recruiting ranking and odds of being drafted, though the ratings are far from perfect.