Yes, the schedule has 5 Tests in England in mid 2013, followed by 5 Tests in the Australian summer of 2013/14. So, there'll be a whole 3 months between series.
I think long term it's going to help England out - they are always bitching about having to come to Australia for the Ashes, and then play a World Cup a couple of months later...whinging Poms
If they ever won a WC there would be no complaints...
Despite those benefits, I think the administrators were VERY happy with the idea of moving up the Australian hosted Ashes, purely from a greed point of view. Ashes means more money, more viewers etc. But to be fair, after next years 10 back-to-back Tests, no one will care about Ashes overkill it will go back to normal.