Never heard of it referred to as the "FMC", but yes, I am using the FireSIGHT Sourcefire3D virtual machine downloaded from Cisco. It has 4 vCPU and 4G of memory, which seems like it should be adequate for what I'm doing. I have virtual machines with 1/4th of those resources that serve pages much faster.
Maybe I am just being picky.
Thanks for your feedback.