I haven't spent all that much time with mine, but I did get a chance to chrono them over the weekend.
The first chronoed pretty consistantly at around 250-260 fps with a .2g BB. I chronoed the second one, but only got one shot off before the mag ran dry (and I was too lazy to refill it). It chronoed at around 250 fps.
I fired both of them a bit before chronoing them, and noticed that both were over-hopping pretty severely. I made no attempts to correct this, so with the hop propely dialed in, it might be a few FPS faster (no empirical evidence of this, just an assumption)