That's what I'm experiencing as well. It's not bad, but a little noticeable and the lights flicker. Have asked BB to smooth out the idle as much as they can.With a stage 2 you should be alright.
I will tell you, with the Stage 3 you definitely a 3-3200 stage. I did my cam first, drove it.....and was like ****, need a stall now LOL. Had nasty cam surge at stop signs and lights.