I'm following most CM9 & CM10 threads since the beginning. Also I've tested most of the ROMs (I wouldn't tolerate even a single RR). Random reboots are not common since the early days of CM9 & 10. Someone may have them, but it's an exception, not a rule (as you said).
I agree. The last 'Random' reboot I had was back in the unstable days of CM7; any 'Random' reboots since then have always been due to me messing about with development settings, using a function that was currently listed as 'partially working' or 'non-functional' or installing a 3rd party app that attempted to access a function that was not supported.