Actually-- not true. if one is dancing to clave rhythm , then the developememnt from danzon, was commencing side left on q.q..
Its also the same for Guaracha .
Does it make a difference -- yes -- you are interprating different instruments in the musical construction.
International style Rumba, also follows the same accent, with one distinct difference-- commencing fwd break on left foot .
Its predecessor, Bolero, begins in the opposite direction, commencing side left (s ) and breaks on 3 of the bar, right foot -- q , backwards .
It also follows the " call and response " of latin music in general .
Whether dancing open or closed styles the integrity of the origins, should really be maintained .