Reminds me very much of my M.D. who is in himself a top class salesman and motivator, if you go over the positive's enough the team will start to believe in it and themselves. He is saying all the right things at the right times, eg seeing the same flaws as everybody else and setting out to improve those areas.
I know exactly what the O.P. is saying it can sound like waffle after a while but this will be accepted while we are improving, it just worries me how it will be taken during a bad run.
For what it is worth I am really impressed so far with the team and what he is saying!