I thought I posted that of all of us, only GraniteChief, TennisBalla, and TonLars can get close IF they work on their serves lots. I'd consider LawMan, who hasn't posted in years, and the Buff bros, but they need technique work for a while still.
Can you name any other's? Consider...Kiteboard is 6' tall and a superstrong and agile 220 lbs. He only claims lower teens, and he's been a solid 4.5 who can play open tourneys for over 15 years.
There are a few guys who claim 5.5 on here, but they don't post often and don't brag about their service speeds.
I can only hit about 106 right now.