Interesting post, Dave. You made some good points.

There were one or two things you didn't consider when counting how many positive posts were made in Frank Zhang's favour, though. The following questions and points should be considered:

Does Frank Zhang concentrate mainly on recruiting FOREIGN teachers?

How many of the 118 posts that favoured Zhang had a "Chinglish" feel to them?

If a post contained a large amount of "Chinglish" doesn't that leave a question mark regarding the authenticity of the post?

While there are quite a few non-natives teaching here with dodgy English skills, those posts that look as if they've clearly been written by a non-native can still be called into question. If Frank Zhang doesn't recruit non-native speakers or only a few, wouldn't that call into question the authenticity of the posts even more?

A lot of posters who favoured Zhang had a name including surname that suggested that they were a NATIVE SPEAKER yet they wrote using the kind of English that is commonly employed by a NON NATIVE speaker. Does this not leave room for doubt about the authenticity of those posts? If they were native speakers why did they clearly "sound" like NON NATIVE speakers?

Some of those favourable posts, in fact, many of them, could have been written by Frank himself or at least a friend or associate of his.