Yeah, a bunch of console commands control it.
Exact information can be viewed here. I believe there's more precise information on the formulas somewhere on ESR, if you look around. I'll attempt to dig it up later. If I find anything, I'll edit this post.
* 12:14a ** (injx) if B is your base sens, then your accelerated sens is B + (A(v-c))^(P-1), where A is mouseAccel, c is the offset and P is the power
* 12:14a ** (injx) (v-c) is bounded from below at 0, and the whole thing is bounded from above at the sensCap
* 12:15a ** (injx) v is the mouse speed obviously