LOL what was surprising was that an elderly thin woman was consistently hitting 90! Everyone was surprised.
Before that tourney, there was a "practice" for several men at a resort. They were going to the tourney, and wanted to clock themselves beforehand. Radar gun was set up. The men were mostly 4.0s and 4.5s and regulars at USTA tournaments. I watched the whole thing. Most serves which were over 70 were faults - and don't even ask about foot faults. There was just one guy who could serve with any consistency above 80 and once hit 98 or so.