The 9/8 rhythm is zeibekikos, the slow dance that is done by a solitary dancer--not to be confused with the the fast 9/8, which is karsilama, and every greek, turkish, armenian club band plays Rampi, Rampi as often, or more often, than they play Miserlou--

Anyway, I think that there were more Greek refugees from Smyrna than from the Black Sea, and there were at least an equal number who fled from the Anatolian Plateau--interestingly, the term "rebetiko" seems first to have been used in the US--and Greek music (and rebetikos) were first commercially recorded in the US--