Still you don't prove what you are saying.
Why would anyone who is not going to take the GMAT participate on a beatthegmat forum.Just because English is used on this forum,you will participate on this forum?
Why the number of Indians who participate on quantnet.com[another English language forum] is much less than the number of Chinese or Americans?
For eg: Let's assume the is a similar forum for LSAT.Do you visit that forum and make as many postings on that forum.If you are not at all interested in LAW,even if you know english,why would you visit an LSAT forum.
The real reason is as follows:
1) Indians are much more crazy about an MBA than Chinese.[There is an MBA mania in India.Just to make my point just for CAT ,an exam conducted by IIMs for a degree similar to MBA , almost 300k people sit! India ,prematurely,has become a service sector economy.Whereas,China's economy is much more into manufacturing and other hardcore areas.as a result,by UN's statistics,the number of Chinese engineers that graduate each year outnumber the total of graduates from India+total number of graduates from USA.!
Talk about that!
2) Everyone in India wishes to weigh his options [since quality institutes are a scarcity in India,everyone wants to jump into either US or Europe].All these people post on the forums to get advice.
3) Indians,in general,waste much more time talking on the internet than Chinese do.[Chinese do Indians talk]
4) Indians have always been fans of test prep [IIT-JEE and CATs].Whereas, Chinese believe in self study [just check how many people actually are present in test prep programs such as MGMAT's KAPLANs or Vertias's who are Indians].Chinese on the other hand have never been fans of coaching institutes.
Bottom-line :Indians just like to get coached.
6) Many sites such as btg could have been blocked in China.This is not the case in India.In-fact hardly anything is blocked in India.
Besides the question why Indians are the majority.You limited your analysis to Chinese[non English Speakers].What about Americans+Aussies+ Britishers +Canadians? [all of them are English language speakers]
According to the GMAT's data Indians are barely 10% of the test takers,but on this forum,the percentage of Indians is more like 50%.