If you ask percentage of local girls against WGs, in my experience, I would put the percentage to 70% locals and the rest as WGs.
I have been there on and off for a total of 7 years and found the local gals (and other Asian gals living in HK) to be far more pro-active.
WGs on AFF are of a certain ethnicity that exists on the southern shores of HK but if you are looking for quality local gals, you do get them provided how you appeal to them.
There have been success stories (many) and a quite a few failures . But yes, if you are a caucasian ( i.e white, western male ), you will be drawing a huge sample of women members on ayeffeff and other cousin sites
Not to mention, I have ended up with quite a few good friends from AFF. Beneath the carnality, there is a soul searching for whatever acceptance and hearing it can get.. so it works both ways. An F & F experience or a F & R experience if you want it to be.
(F&F - fuck n forget)
(F&R - fuck n remember)