Nice serves. You are right about 3.5 and 4.0s having 80-90mph serves mostly. The 5.0-5.5 guys I know have 115 mph serves. I was radared at 110mph and next time I get to the baseball place with the radar guns I will take my racquet and camera. I didn't realize nobody had yet shown video of their serve with radar proof. Nice ground-breaking stuff there.
Your ball hits the fence about the same height as mine so I definitely believe.