I joined WGT land October 12. OK time on hands and played a fair bit but also played the game fully buying equipment as went along and some power ups to...........I moved up to Legend easily after 2 or 3 months tops with an average of 61 at L70 something .................Not a re-starter, NO cheating required! and I played mainly stroke play working on my averages, just getting to know the courses having fun...I played it just because I enjoyed it..................................................And so it is V.V. possible................Basically it's therefore available to you and no need to think you have a cheater!
I went through those ranks often playing with someone in my boat, and he did it in that time to.I now count him as a friend. He does not play so much now as hit Legend at L64 I think (not as keen spending on power ups as me). He may get back to it but was put off, in some part, by the dearth of equipment then available to enjoy himself with............
In fact if I spoke to a brand new player with what I know now I might tell em to hang around in a given tier a bit longer, take some money from RGs ............I just played and got fascinated to see what came next, and not sure I would do it any different again.......................