I fired up my Blichmann for the first time today, too. Dang thing is near silent. Library quiet, at least.
Did you have any trouble adjusting the flame? (Regulator vs. air louvre) It seemed OK at first but the temp stalled at around 160F so I started messing with it, don't know if that helped any. Overall it seemed a bit slow to get 5 gallons up to a boil.
I was getting a lot of heat wash around the bottom of the kettle, not so much farther up. Could barely touch the valve handle despite it having a heat shield attached.