Well, for the most part, I dont have the luxury to ride good waves with power like you west coasters have on the regular. I ride east coast, lower period beach break and jetty waves. If I was in SD my boards would likely be shorter...It does look like the smaller sizes are working better for you. Manny generally recommends sizing up but does it not work as good?
A few years ago I was most happy riding on the smaller side of things. But I'm getting older so the boards are getting longer.
Or maybe Im just more clearly listening to Manny's clarion call...