Recently, I met a Civic Hybrid owner. He wasn't the happiest person in the world. He told me the avg fuel consumption was 9-10km/L. He wanted to get rid of this car and switch with Prius.
I personally believe, if you want to buy a Hybrid, go for Prius. Remember, Prius & Civic Hybrid has different hybrid technology. See comparison at wikipedia.org - and search Prius hybrid or Hybrid cars.