Most FTs 'teaching' EFL in China wouldn't and needn't know the meaning of that acronym. So, I'll discount what you expect in that regard. What's surprising to me here in the PRC is that most FTs can't distinguish between EFL and ESL. That should tell you sth about the average FT here, and the low English levels of many Chinese students.

Though perhaps it is time these questions were raised?

How many FT's in China can prove they have a clear criminal record from their country of origin, and would leave China to do so to obtain said documents? Those that do have nothing to hide, would only do so under duress, the rest with something to HIDE, would simply leave China and work elsewhere. It is already happening in Guangdong, let's see what happens in the next few years.