I had a florida prince tree that was super low chill (100-150hrs). It was the earliest fruit of any peachers here. Fruit was ready by end of April. The problem was it came out of dormancy so early it would get hit by peach leaf curl worse than the CA varieties since our wet season is in winter and early spring here.
Just sharing my experience. I would be interested in the UF best but I think it would be the same story. Those peaches from FL are crazy low chill hours.
I think a person growing peaches would be best off trying to roughly match the chill requirements to their particular weather/location. My location, seems to do best with trees in the 200-250 range. AZ, probably has more chill hours. Other places, even nearby here in SD county can have a lot different chill hours depending on their elevation and distance from the ocean. Im just throwing that out there for food for thought for people growing these stone fruits. The chill ratings seem to matter quite a bit.