MGBT,

Most of my opinions on P&G are stated by Schwa above. I'll just add that Wayne has demonstrated without doubt the HM is not specific to the hybrid domain. Just look at his Honda Accord (non hybrid) MPG. It is close to 200% of EPA.

My take on the technique is a tool in the box. When driving conditions are conducive, I use it. More specifically, when it is best to coast, I glide :-)
In my city driving in particular, I have long stretches of gentle downhill slopes. Once I get up to speed, gliding (ICE off) allows me to travel literally miles at a time with no change in speed at all. Quiet, peaceful, simple, unobtrusive. What is not to like ?

In a similar vein, if I can keep my speed constant by electro- motor force only, I do that too.

These driving strategies are variants of P&G that take advantage of the hybrid, and specifically of the HSD design that allow one to drive part time with the ICE off. I have always appreciated quiet cars, so I LOVE stealth :-)
That it happens to also be a high MPG technique is icing on the cake.

I'll go out on a limb now: I suspect that the majority of people who have lmpg < 50 in a Prius II is not because they ignore P&G variants, but because anticipatory driving is lacking. My wife certainly fits the mould. She is as non-aggressive as one can find, but she simply cannot learn to take her foot off the gas until she is 30 meters from full stop. She doesn't even realize where the problem lies, and it causes a *lot* of frustration. She drives slower, uses less AC, and STILL posts lousy MPG trips.

R2-E2, 2G Prius.
Highway/City/Husband/Wife MPG: 56.5, as of 12/2005, 26K miles

Jac Nasser, Ford President: "We are planning to launch a hybrid version of
this car [P2000] within this year [1998]. We will also make FCEV available in
2004."