fmagnets:
Out of interest, if you are determined to use this method, why not do it for 18 holes? You get 1400XP for completion + 270XP for the shots. 28 mins to complete.
I played 18 holes last night, half dreading finishing in case it only worked over 9 holes but there it was: 1,400 shiny bonus points plus 270 for shots taken.
I can get 18 holes played in about 25 minutes so if I have a bit over an hour of mind numbing digging the tee boxes to hell each day I can get over 5,000 exp, plus daily bonus. Plus any real rounds played. At that rate I'm less than 2 weeks away from level 97 which I was expecting to take over 2 months.
I've never tried XP boosts. Got given one once but I was offline and by the time I logged on it was all gone!