Very interesting. Can you point us to a link David?
I did find this:
http://www.usatoday.com/money/autos/200 ... usat_x.htm
It's pretty signifcant that the Prius and HCH fuel ratings are down by 16%, whereas all the rest (including other hybrids) range from a 12% decrease to 7% decrease. This will not be good news for Prius sales as their new mileage rating comparison suffers.