I have always wondered, and now with the extended "open gym" dates, how many teams are already picked and ready to go to actually start practicing on 10/15 rather than still in the selection process?

I believe you have to have three tryout dates.

We have to have 5. I ain't sure if its a school rule or what.

Without wording it exactly as "you cannot cut before October 15th" that's basically a part of the rules with the extended off season "voluntary" practices. But yes, there won't be as many surprise roster additions as there probably were before the rule change. Coaches for the most part now know what they have coming in from top to bottom minus a few wrinkles.