I've been using SO for a little over a year now, and recently I've noticed a shift of users between SO and stats.stackexchange.com.
I'm wondering if there has been any discussion on where questions about R, a statistical environment, best fits. Would you say it's better to ask R questions on SO or would it be better to ask over at stats.stackexchange.com? What, if any, determinants would you use to decide to post between the two? What about cross posting?