I use whirlfloc also. I used to use dried moss then switched to Whirlfloc all this before my wort chiller. I noticed better protien coagulation even without rapid cooling.
Now that I have used my wort chiller it all settles out Oh SO nicely!!
Whirlfloc tabs!! The way to go....There is another product out there. Super moss I think!?!?
"You can't be a real country unless you have a beer and an airline - it helps if you have some kind of a football team, or some nuclear weapons, but at the very least you need a beer."