When taking my Volt on short day trips to nearby towns, I was surprised by getting better than the 50 mpg that I would expect from a Prius. I get 60, 80, and offen more than 100 mpg for 80-150 mi round trips without charging. I usually take shorter, slower routes and hypermile to get the first 40-50 miles on electric, and continue hypermiling after switching to gasoline. I had considered the 35 mile EV range insignificant for road trips before I bought the car, thinking that a Prius would be better for these trips. If I had done the math before hand (and known that I would take up hypermiling), I would have realized that the Volt is best for everything but longer overnight trips.
I have been extremely happy with the performance of my Volt. I expect that Ampera owners, in the land of expensive petrol, will be even happier.