I'm really glad it worked out for you.
I finally remembered to time my results. For a 6.5 US gallon batch of 1.068 wort, the temp went from 212F to below 140F in less than two minutes. (140F is kind of the magical mark, as no DMS is created below that temp.)
It had dropped to 112F in just slightly over 3 minutes. I had originally thought it was about a minute to drop 100F. I'm not sure if that was because I was using the T with more flow or just my imagination. Currently I'm just using a bent hunk of copper and it still works great.
Once I get down to tap water temp, I fill a bucket with a few trays of ice cubes and a couple inches of water. I then pump this through the chiller coil and back into the bucket. I can get the wort down to lager temps (and a huge amount of cold break) using this method.
The last time I tried it, I went in the house for a couple minutes and when I got back it was down to 40F. Good thing I like to pitch cold. 
