Bingo! It's all about pressure. Atmospheric pressure on a standard day at sea level is about 14.7 psi. At my house 7500' altitude its about 11.1 psi. That's about 3.6 psi difference and MASSIVE difference in horse power. If the ram air at say 75 mph can raise the inlet air pressure by only 1 psi that would make a big difference.
This would support the ram air advantage. Perhaps, at high bike speed and high revs we're seeing a slight pressure increase in the throttle body instead of a negative pressure decrease.
Or perhaps it's just my imagination. Either way its an awesome bike!
chrs-mat