Originally Posted by WildVolley
It just looked like the sort of motion one might adopt to protect his shoulder.
My suggestion would be for you to try the tennis ball in a tube sock method of getting a nice easy racket drop and timing. Take a long tube sock and put a tennis ball in one end. The idea is to take a nice relaxed serve swing and have the ball travel in a smooth drop and then accelerate to contact. If done properly, the serve shouldn't be forced, which helps protect your shoulder and would eliminate the pause at the racket drop.
I saw an interesting video of this on Essential Tennis. with some tube socks.. I'll try that