Hi Stu, I know that the score may seem too good to be true, but I would bet the player had great equipment and has a lot of experience under their belt.
All a CTTH takes is 9 shots, and some players might play that hundreds of times, taking notes each shot until they come up with a great score.
You have the starters clubs which are not very forgiving and certainly are not very accurate and with those will never get close to a score like that, but if you did play the coursehundreds of times, taking detailed notes of winds, clubs, power etc, you would get a vastly improved score.
Don't worry about other players scores and just try to do the best you can - set yourself goals and enjoy the game.