@cousinfloyd I recently attended the 2017 NAFEX/NNGA annual meeting. Jerry Lehman basically said during his presentation that Meader is worthless and full of seeds. I know that doesn’t really answer your question. Also, I do have Prok and Yates, but no fruit yet. It appears these more northern cultivars grow extremely slowly down here in zone 8. Also, the leaves are riddled with dark brown blotching, I read something about this in a pomona article. I may be able to locate it. The hybrids are very vigorous for me.
Also, Jerry did mention something about part of a “female” tree developing male flowers. I need to look at my notes, if I took any.