Wash Times
One has to understand, at least from an Amercian point of view, front load washing machines with long cycle times are seen as a disadvantage. This is one of the reasons they pretty much died off on this side of the pond in the first place.
Americans by and large tend to do laundry the way it has been done for ages. Large amounts of wash done once a week (or even longer), and that requires a machine with a decent capacity and cycles fast enough for Madame (or anyone else landed with the job), to get the thing over with quickly. The idea of doing wash every day,no matter how small the load, as per some European households is something that for the most part would drive Amercian housewives up the wall.
As for wash results and cycle times, commercial and laundromat front loaders get very good results indeed with wash cycles under 15 minutes. However for the most part such front loaders use much more water per cycle,and are designed to process laundry quickly to enhance turnover (not laundry, but allowing a machine to do more loads per day).
As one has repeatly stated, proper laundry practice is the sum of four main variables: time, temperature, chemicals, and mechanical action. If the last three, more importantly the final two are properly adjusted, one does not need hours of wash time to get the job done.
If one is laundering a grossly filthy laundry, a pre-wash or soak followed by a main wash cycle is vastly better than one long main wash cycle. Hence the reason most if not all laundromat and commercial washing machines have either a set pre-wash or it can be added by user/owner. Far better to have a change of water and detergent to carry off the loose and some of the heavy soil, then attack what remains in another cycle, then to have the lot stewing in one main wash cycle. Indeed results from this system (which is how laundry was done for ages anyway, even by hand)are better because there is less redeposition of muck onto textiles because the two short cycles allows muck to be kept away from laundry and goes down the drain. With non-phosphate detergents becoming the norm, this even more important.
Finally with domestic front loaders using less and less water for wash cycles, long wash times with so little water increases wear upon textiles. This is because textiles are now rubbing against themselves and the wash drum more harshly due to a lack of "extra" water to cushion the reaction. Of course drum movement (mechanical action), can be adjusted to compensate for this, but then you are back to those four variables again. Hence the long wash times because you have reduced mechanical action.
L.