http://kotaku.com/5582531/layoffs-hi...ion-v-creators
I'm guessing they were from AI quality control dept, but it could have been people working on the 3rd Firaxis title (ie, not CivV and not Facebook civ). Jesse Smith was layed off around that time too, wonder if he was clashing with some vision of Civ V (though he was heading up the cancelled project as well)