I don't own and have never driven a hybrid, my experience comes from the other side of the fence.
My boss drives a 2011 Toyota Camry hybrid and we've had a friendly rivalry over fuel consumption this past year.
At first, her average easily beat mine, but as I've slowly gotten better with the Mazda, I caught and have now passed her average.
She complained when it was put in for it's last service and the serviceman told her that that's as good as can be expected from the 2011 model, the 2012 model is "much better".
She's not a happy lass.
I've advised her to slow down and showed her the Camry fuel / speed graph that MetroMPG posted. Time will tell how keen she is to work to reduce that figure.
I guess the point I'm trying to make is, just because it's got a hybrid badge on the back, doesn't guarantee incredible figures. Where and how you drive still makes a big difference.