Hi jonhboy,
honestly, wfp gets quicker and quicker.
the trick is the first 3 cleans... clean the top of the frames really well, then each time after that you will knock 30 mins off a job.
you will notice that the the glass 'feels' smother, and the results are really pleasing.
it was ground, first and second floors, outside only.
rule of thumb for me is 2 blokes on ladders = 1 bloke wfp.