I've seen it mentioned on here and googled for the thread. It is a speeded up gradual retreat. I'm seriously considering trying it at six months to try and start a bedtime, if it hasn't happened before then. My DS is currently 22 weeks, goes up with me at 9pm and wakes many, many times in the night. Mostly fed to sleep but occasional rock or bottom pat if he rolled onto his side.
Just wondering if anyone had any success, or not, first hand