V-In order for these new front-loaders to clean properly, you can't have an over-abundance of suds in the washer drum (they cushion the clothes from one another, defeating the purpose, because the action of the clothes tumbling and the friction is what gets them clean). The big brands of detergent (Tide, Gain, Cheer, are too sudsy, and the HE detergents generate less suds in the drum.
So what you need is a low-sudsing detergent, not necessarily an HE one. There are regular detergents that tend to be less sudsy, like Arm and Hammer, Fab, Purex, etc.
But the detergent companies (I believe in conjunction with the washer manufacturers) sold HE detergents, which originally cost more, so they could keep front-loading customers away from cheap detergents, keep them using the same amount of detergent each time instead of having them just use less regular detergent, and create another specialized product.
When that routine only went over so well, they began issuing warranties on new front-loaders sold that specified that using a non-HE detergent would invalidate the machine's warranty.
Opinions are divided on whether or not a front-loader requires detergent with the HE emblem on it. I believe, that with my soft water, you can get away with a proportionally smaller amount of certain lower-sudsing regular detergents and do just fine.
The reason why the machines in laundromats never required special "HE" detergents is because those machines are designed differently than the ones they are putting out for us to buy for our homes, and the laundromat's machines don't use such small amounts of water, where suds control is so important. IMO, most folks in the laundromat aren't going to obey any rules and regs on what kind of detergent they are told to use anyway!