I have a Beko 5120 - Cycle Times
Most of the time I use the Quick Wash Button when I do a wash on Cottons/Synthetics, but after the wash has finished I rerun the Beko on Rinse again with conditioner in Because the quick wash only gives 2 rinses instead of 3. And my old Zanussi FJ1225 you used to be able to select quick and super rinse at the same time giving you a short wash with 3 rinses instead of 2.
I do use the long washes for really dirty loads, I washed my mums white bedding on the Intensive & Stain 60*c cycle as it had red hair dye on it, 2 Daz Tablets a long wash of 2.5hrs at 60 got the bedding spotless and it was very white.
I do think though if you use the long wash cycles for dirty loads or stained items, then it helps, most of my clothes are light/normally soiled so I feel a long wash isn't necessary, although sometimes I do wash alot of clothes on Synthetics 40*c which takes 1hr 40 minutes, or about 55 mins on Quick Wash.