I just ordered a set of these as well. I'm curious if I'll see a little more timing in my logs now. Either way, at least a 1-step colder plug is what we should all be running on tuned cars.
I do Installs and flash tuning in South Florida
-2008 335i SGM on Terra 6mt
-1997 Jetta TDi 16v ABA Pt6266
-1997 M3 Pt6766