I just got a swing speed radar in the mail.
I was really concerned the last time that I went out, because I was flushing balls with my driver and they were only going 210 yards. Of course, this was all carry on a wet course, but still, totally unacceptable for my normal standards.
I get the radar, hook it up, and use it while using some of the tips for a slower backswing that I got during a lesson last week (my first).
90 mph
I go back to my regular backswing and it's at 102. I usually averaged 100-105 on those things.
Then I remember to swing more around my body (I'd been picking the club up in order to create the illusion of a bigger backswing)
108 with a balanced finish.
Now we'll just have to see if this transfers to hitting balls.