Here's a quick short video of me serving during pre-season. I calculated the frames and it says my serve was 91mph, and 93mph.
During season i've served bigger, in high school tennis I have no problem because most people can't handle it very well. I have a consistent kickserve for a second serve. Which helped me, but once i'm outside playing 4.0 tournaments i have trouble with my next shot after my serve because i'm always so much into the court and don't have time to react.