Guidance from our beloved FDA on resubmissions:

http://www.fda.gov/downloads/Drugs/.../Guidances/ucm079303.pdf

Dated but you get the picture.

Class 1 Resubmissions — Performance Goals
FY 98- 90% in 6 months, 30% in 2 months
FY 99- 90% in 4 months, 50% in 2 months
FY 00- 90% in 4 months, 70% in 2 months
FY 01- 90% in 2 months
FY 02- 90% in 2 months

Nobody bothers to even discuss this possibility. A faster approval (if there is to be one) is much more likely on a resubmission than the FDA fast tracking a drug which has precedence. I will try to track down the last CRL timing minus the 1 month delay for the Shrekli happy horse pucky when I get time.