I agree that it goes both ways, but regardless you expect a much better result as a team. Getting shut out whether its preseason or the Super Bowl is never a good sign.
I think back to before the 2006 season when Al Saunders decided to basically taper his offense down so all of the complicated movements and formation shifts would not be included. I think the result of that philosophy showed in the inability of the offense that season.
Certainly you have to be concerned that this team was shut out, but even then it is preseason and there is still A LOT of football to be played.