Yes I mentioned alcohol, and its limitations. In a carpet cleaning context it can't validly be considered an effective tool to speed drying.
It's an interesting marketing spin, but would be very dangerous in quantities needed to clean carpet. Alcohol can displace water, but won't "remove" it. If you used enough to even come close (more alcohol than water) you would turn a modern home or business into a potential bomb.
It's very volatile (evaporates quickly) and flammable. Pilot lights, or other sources of ignition would be easy to find.
I can think of a couple of people who went down that road.
Thanks,
Lee