First off, let me just say that the juniors around here regularly kick my lowly 4.5-level ***. However, they typically hit 100+ serves on a regular basis.
Honestly, a 45-mph serve would be crushed by me for a winner at least 80% of the time. That's just pathetic. I can't believe a junior that regularly cleans up at 5.0 level would be able to survive with a 45 mph serve. I don't care how good the rest of their game is. When they have to start EVERY service point on defense, they can't possibly win very often.
There is probably something wrong with that radar gun. 45 mph is ridiculous. Honestly, even 78 mph is absurd for an open-level first serve. That would be crushed around here, and my area is actually pretty weak.
Lois: "Peter, I'm not wearing any panties."
Peter: "That's ok, honey. We can throw that chair out."