My report: The Hydra, with me stirring, took 11.5 gallons of 1.090 doppelbock wort in my 15 gallon Bayou Classic BK from boiling to 68°F in 11 minutes.
I went to get the primary fermentors and transfer hose set up, leaving the water running for another 5-10 minutes (no stirring). By then, the temperature of the wort was down to 52°F, and I drained it into the primaries. Did a real nice job dropping out the cold break.
I'm happy.