My mentor, a 1900 rating player lost a game to lucaitalia, played yesterday 11/29, who exchanged his light square bishop for whites light square bishop, a technique I referred to earlier in this thread
Well, either the players my mentor plays with it are two amateur to realize blacks error or my mentor has a superb style to win just about every game with it'
Suggestion: take a look at a series of games played by my mentor just now using my username. Lost of tempo doesn't affect the 1....e6 2...c6 and sometimes 3...c5 if white plays 3...e5 used exclusively by black. If white does not play e5, black plays f5 following with nf6, a Dutch defense. That said, maybe white is deceived and unfamiliar with and likely makes mistakes!
Optimissed, his username is chesslight4983 with a blitz of 1933...he uses the same line as black against decent players. Point is the only refute against the line is loss of tempo by moving same piece twice in opening. Chess rules are not absolute!!