There is certainly much confusion about if NOx is a problem, looks like depending on vehicle/driving style it can go either way.
http://www.nrel.gov/vehiclesandfuels...pdfs/38296.pdf
FWIW, I shift at 2000 rpm. The turbo has hardly kicked in at that point.
It seems the effects on particulate matter is quite good, with 1/2 as much as dino in some cases. the concensus seems to be that retarding the timing a couple degrees fixes the nox, if it is an issue for your vehicle.
I'm curious though, at, do you not believe me that when my car first starts on b100 it smells more like something from the kitchen than short term death (like my neighbors truck that idles for an hour)? This is experience, like every morning, talking here.