If you have watched Terry in action in the flesh then you really do get to appreciate just how fast he really is.
With an applicator and a squeegee you can set standard rules that all can abide by.
THe work carried out can be checked for runs and mistakes.
WFP on the other hand would take forever to check!
You'd have to wait for the glass to dry before you could check it for spots left behind!!!
I'm quick with WFP, and if you have a truly massive flowrate you can go REALLY quick!
But trad is much faster in race conditions.
I've timed myself on a pair of patio doors, bear in mind that you at least have to wash the window with WFP, edges, corners and to cover all of the glass.
In normal working conditions WFP is most certainly quicker, but after just a few goes with trad equipment I was way, way quicker. Of course that was also using the two handed technique and no detailing.
However...in normal working conditions and on a property with easy access all round, even on a bungalow I am quicker with WFP, and I promise you I am no slouch with a squeegee....but also to point out I am talking about a clean of windows that have had a month to get grimy, so the work with either method has to be carried out properly.
Ian