Does it seem odd to anyone that hybrids are being criticized for not being able to sustain 70
MPH? Given that wind resistance takes more energy to overcome after 40 MPG, and we've all seen data on how inefficient things get at 50, 60 ,70+, seems a tad contradictory to call the hybrid inadequate to perform a task that is directly counter to it's efficiency goal. Isn't that like buying a pair of dress shoes then complaining that they hurt your feet when you jog?
If you want to go blasting down the highway, buy something suited to that purpose. Don't blame the Prius.