@ ej20 ... interesting observation, particularly for Faldo, who was not a long hitter even after rebuilding his swing with Leadbetter. Accuracy, yes .. distance, no.
Perhaps it was because he was a proponent of "same swing for all clubs" ... and this caused him to limit his driver distance ... ya think??
As for the hip position at Impact, wouldn't you think that wide open hips are a result of very high hip velocity and therefore a big generator of momentum that cannot be fully released without opening the hips a lot ..???
That is, the more open your hips at Impact the faster your hip turn. Faldo and Elk have slower hip rotation and that's the reason they don't generate enough kinetic energy for distance. I suspect both can speed up their hips, but then their accuracy would suffer.