Originally Posted by the_bird
I've never been able to wrap my head around why that would be any better than simply stirring the wort (gently) around the IC. That's what I used to do before I got the plate chiller, and it made a huge difference.
Not any better except you don't need to do it yourself. If you used a pump, like afr0byte, then it's exactly the same.
Jamil explains a ton here: http://www.mrmalty.com/chiller.php
I have a Therminator and love it. The one MAJOR advantage the plate chillers have over other types (and it might be the only advantage) is that it is the most compact chilling solution. For homebrewers without large brewing sheds, the growing collection of gear scattered in our living space is an issue.