The number of directly connecting users from Russia does appear to have doubled [1], but this can also be seen in UK user numbers [2]. For such an increase to be seen globally my hunch is that this is down to either the Pirate Browser [3] or some other software release - not necessarily a response to a particular law being passed, NSA leak etc.
[1] https://metrics.torproject.org/direct-users.png?start=2013-0...
[2] https://metrics.torproject.org/direct-users.png?start=2013-0...