Nope, not exactly true imo.

'Deechers' can be found 'deeching' in all kinds of educational establishments. However, though there is no doubt that that scourge of EFL teaching is most prevalent at training centers, it also affects kindergartens, private schools and universities, and state-run educational establishments. Private schools and kindergartens have the most 'deechers' after training centers. There are also 'deechers' working in significant numbers for elementary schools, junior high schools, second-rate senior hign schools, and lowly colleges and universities, whose students are quite easily duped.

My definition/suggested meaning of a 'deecher' is a phoney teacher - one who's unqualified and/or unable to teach adequately due to a bad accent or a low level of the English language.

'Deecher' is a word invented by Turnoi. It might well have a different meaning in his eyes to my suggested meaning.