To my best knowledge, the tee settings do not have a definitive effect in the game.
Edit:
Oops, mixed up tees and pins from here on - sorry, irrelevant to the discussion.
First, there are a max of two pin sets for any course, so "med" would be a mix of both. But, regardless what you set up, the tees are determined by the game itself, possibly with the player's tier as a factor.
I learned this the hard way when I wanted to check distances from the tips on KIA#9. Set up a game, "easy", found the front tee on hole #9, then set up a game with "hard", only to see the same tee after eight holes :(