UPDATE 31/7/2014: It continues unabated.
I know that the general issue of cross-posting questions has been discussed before; opinions were not unanimous, but one could discern that the general tendency was rather "against" than "in favor". My question specifically regards synchronous cross-posting in CV and math.SE, because this happens a lot – and for known reasons: there is a rather strong group of answerers in math.SE regarding mathematical statistics and probability theory. I participate also in math.SE, and sometimes I answer some of the left-overs, and this is how I know that many questions are cross-posted practically at the same minute in both forums. But I find myself rather reluctant to churn out "please don't cross-post", mark as duplicate, etc. at the volume needed given the number of cross-posted questions... Sometimes, perhaps one should go with the flow.
There is also the methodological dilemma: which forum should be considered "primary" and which "secondary" in this specific case? (I am posting this for discussion; I don't ask from anybody to "tell me what to do").
P.S. Should I... cross-post this in meta.math.SE? :)