Hey Fabien, thanks for pointing me here with your explanation. Your hard work is invaluable to the WGT community.
I saw some dude back a couple of pages who contends that some of us with low averages play nothing but easy RGs from forward tees is pretty laughable. As some have already pointed out, there's a huge difference between playing free multi-play tourneys or free ranked rounds, versus ponying up 1000 of your hard earned credits against the best of the best.
While I don't wish to fan some still smoldering embers on this fine discussion, it DOES bring up a good point. Not all 9 or 18 hole rounds on the various courses under various conditions are equal with respect to how tough it is to shoot a decent score. Furthermore, if you're calculating averages on gross scores posted, you have the added complication of courses with par of 34 through 37 on 9s and 70 to 72 on 18s. In other words, if I have a theoretical 60 average, I only need a -4 to shoot my average on Olympic front 9 and a whopping -7 on Whistler front 9.
This is why for those of us who maintain real handicaps with the USGA stateside (I dunno how the R&A does it for the rest of the world), we've been playing with a "slope system" for many years.
http://www.usga.org/handicapping/publications/The-Truth-About-Slope/
They predetermine how tough or easy the various courses are and recognize that if you shoot 72 on one course, it's not the same as shooting 72 on another and your handicap is adjusted accordingly.
It's high time WGT recognized this and made similar adjustments to the way they calculate player averages. Now the slope system DOES NOT make allowances for whether you play under high winds or if the greens are playing fast or slow on any given day... but it's arguable that WGT can take these factors into account as well.
Probably not an item high on their "to do" list, but it makes for interesting conversation (for me anyways, lol)