After hearing of this, I decided to try it out. Seems a compromise from many things I've heard. Simply accelerate at about 1/2 the Prius' capability. Then, set the cruise and try to glide whenever possible, not exceeding the speed limit by much.
I did this, attempting to drive at the optimal ~38MPH when possible on a trip to Borders and back. Took about 15 minutes each way with a 10 or so minute stop in between. Besides the intial warmup period, I must have averaged about 60MPG for each 5-minute interval! Considering my average tank mileage floats around 43, I'm thrilled. I better keep this up...
