i SO OFTEN READ ABOUT SAVING WATER AND SMALLER JETS OR FAN JETS. THE THING WE NEED TO UNDERSTAND WE FLOAT THE DIRT OF THE GLASS. no water no clean.
I agree - I have always taught the 'curtain effect' for rinsing and this is best achieved with a good flow of water. For me the best jets are still 2mm (well 1.97-1.99mm to be precise!).
Without a decent flow rate, you cannot get the 'curtain' and as a result you either spend more time rinsing or the chance of inadequate rinsing. This applies whether rinsing on or off the glass.
For me water is cheap (and yes I am on a water meter) but my time is not cheap. Just my opinion