He said if the donor was in their clinic pool then they passed all the tests and are all good candidates. He said they would not be on the list if they were not good candidates. I think my clinic used an age cuttoff of 31. But my RE said even that was a conservative age cutoff.
Lots of my clinic donors were about 29, 30 or 31 and had been previous donors. The donor I ended up using was 25 years old and she was available and met our personal criteria so we went with her. If she was 30 years old I still would have picked her because I liked her profile though.
My RE said if I looked at the donor list and couldn't decide between a few candidates to run them by him and he would give me an opinion as to which one we would have a better chance with.