If there was a difference in drying times, I'm sure it would be minimal. I groom more often than not, both for the appearance and to rake in protector if applied. Just leaves the carpet with a nice finished look.When I was still a faithful member of the Church of IICRC, the more forward thinking of my brethren used a term:
It stood for "Made Up Stuff" It was used when we questioned things taught that were repeated over the years as sacred, but had no scientific proof.
One example of MUS was "Every 18 degrees over 118 degrees of temperture doubles cleaning power". It sounded good, and was based on sound physics, but did not apply to cleaning power.
In one of the Scriptures of the Church of IICRC , there is a statement that post grooming is to be done to align the fibers to speed the drying process. While first brought forth by one of the IICRC Prophets, I never knew that it was tested to see if it were a fact.
It seems to make sense that groomed, upright fibers would dry quicker than matted ones, but I don't know that there is science to support that.
If true, I would consider it to be an important step.
If not, then its a matter of appearance only.
I'm not rendering an opinion, because as an IICRC Agnostic, I just don't know....
Just for the sake of argument, and if the 80% estimate is on point, it stands to reason that 20% of the remaining soil is also dry. (rather than already wet and thus already mud) (The homeowner can remove 80% of dry soil without calling a professional carpet cleaner.)Glad to see that "some" cleaners pre-vacuum; considering that roughly 80% of the soil in carpet is dry soil. Dry soil, plus moisture, equals mud. It's a lot easier to remove dry soil while it's still dry.