At 12 you really ought to be seeing some serious increase in events occuring, but there is always the possibility that you simple don't have any available for a long period of time. Calabim Refugees is the one I generally used to test things out since it is repeatable and has essentially no requirements. So if you set that to a 100% chance to be included in your game you can get a better feel for how frequently events are really triggering for you.
True that, Xien....I tweaked the percentages for the individual events (set a bunch of them to 100% availability in game) and the 12 really started to matter. Seeing alot more events, now...it's quite entertaining, really, and seems to select from the AI's and human players pretty evenly.
Thanks again for the tips!