When I got my last renewal it took all of 2 weeks... I'd even submitted it 2 months out just to make sure and was a bit unhappy that my new issue would expire 2 months earlier than my previous one. Better that than being without I guess. This was October 2011.
I'd be interested to see stats on monthly demand for ASICs.... surely there'd be a nice peak at the beginning of each year when all of those cadet and degree programs kick off. And if you assume that people don't make like me and accidentally cut time off their ASIC validity by renewing too early... a demand from one year repeats itself 2 years later.
Just a thought.