Hi Vince,
How do you know he wasnt doing it the proper way and your the one that has been doing it a dangerous and time consuming way!!
Might be wrong mate, but going from what I hear off some members here, he could well be a seasoned pro who knows exactly what hes doing. For instance you said about hes scrub how do you know that wasnt hes rinse, you dont need to lift the brush off or even "tilt" for the rinse you know!!! and you can rinse in an up down motion rather like a scrub. Also how do you know he didnt clean the frames first or "box in" as you say.
For cleaning windows above the ones he had already done I cannot comment on, other than he might of done a fly clean including frames and extremly soiled windows then gone back for the final rinse.
ProPole