Wow! That DGCR map is HEAVILY populated! It would take the majority of a month to hit every one of those!
Yes, though to me Charlotte offers a lot of very good courses, but not necessarily great courses. A lot of 4.0s and 4.5s. I refer to it as a quantity of quality.
Whether that meets someone's standard of a Mecca, I don't know.
Mecca is a place where everyone of that faith aspires to visit at least once in a lifetime, and I think of the disc golf Meccas in the same way. That makes for a pretty short list. Flyboy, which I mentioned before, is the only one I've been to. The one I haven't been to that I think of in those terms, is Highbridge Hills -- for the disc golf, and the fact that it's so remote for me.