Does that matter? They probably use the right language to get the job done. Depends of the area of their work.
Yes.
While the evidence provided is anecdotal (that is to say: outliers exist in successfully learning anything outside of a formal education), there are languages designed to be more friendly and more fun for newcomers (Ruby, for example) while others are designed to be translate more directly to the instructions a machine might execute. More anecdotal evidence indicating that one language might facilitate informal learning better might be interesting or helpful.