I was wondering this today, and I've been wondering if it has an impact on the Fresh Clothing moodlet. During my game play today I swapped from Normal to Delicate several times to see if it made a difference. Now, I wasn't paying too close attention to it because I was finishing up my challenge game, but I did noticed that some of my sims had a higher rated moodlet than others, lowest was +15 and highest was +24. I was using the expensive washing machine, and my handy sim had upgraded it with the clean polymer injection (or whatever it's called). Maybe that makes a difference. I feel the need to go test it out now! lol