Brad Noon is the culprit. He used to have an E-ram, and yes, gained HP on the dyno. Simple physics is that even with about 1psi of boost (somewhat equivalent to 70-80 mph ram air effect), the gain outweighs the loss of the extra drain on the alternator.
Gee, all FI draws power from one place to boost it somewhere else. Gosh, even jet engines restrict core thrust to drive the big fan, from where they derive 80% or more of their thrust. (Talking big fan engines here, of course.) Just because you are drawing power to make power, doesn't mean the equation ends up 0 or negative.