Wake turbulence rotates, and for all the "off course" reaction to be in Yaw only is a stretch, something I've not seen addressed, though early on an animation was seen, it required a very specific relationship between the 300's tail (specifically VS) and the rolling vortex from the 747. If the flying pilot bought into wt initially and through the event, wouldn't other controls and thrust settings be in evidence? The author of the USRead piece was more than slightly convinced of his timeline, discounting the wt and drawing attention most emphatically to the call for max power. Something seems awry, just me?