My 2c on the matter. Drag is proportional to velocity squared... so.. for a specific configuration you can increase drag and loss of potential energy(altitude) by keeping the speed up.
This is for a specific configuration only.. putting out flaps/gear and spoilers will increase the drag above the clean configuration. A faster speed in those configurations will improve descent rate/energy loss as well.
Sounds reasonable to me.. feel free to poke holes in my thinking!