From: Dmitry on
I think that the question of performance vs. OS does require clarifications. In fact, this question is explicitly stated here:
http://www.mathworks.com/support/solutions/en/data/1-18C2A/index.html
but it is never answered.
I think that it would be valuable if Mathworks spend some time comparing the performance across various operating systems (given particular hardware) and give us a definitive answer...