Steve,
Jeff's dyno charts can be a bit deceiving, because they say "max air/fuel" across the top, and give you the number before full throttle or any level of boost was applied. This number always appears very lean, because it is not a WOT measurement. You have to look at the actual chart data reading vs RPM to see what your A/F curve and max HP levels are. I'm sure you've figured this out already after having read the TBU thread with the same subject. One of my last dyno charts from Jeff says the same thing at the top for all 3 pulls, but my A/F across the scale was 13.0 for the most part.