KDNuggets has completed its annual poll of top languages for analytics, data mining and data science, and just as in the prior two years the R language is ranked the most popular. R is used by almost 61% of respondents:
R's usage grew year over year as well, up 16% compared to the 2012 poll. By contrast, the rate of SAS usage has been flat, at around 20% in 2011, 2012 and 2013. You can find the complete poll results and further breakdowns at the KDNuggets post linked below.