I've had my C2 just over a week. Posted a high of 61.8 mpg and a low of 52.1. I've been driving over 50 years and have to say this is the most entertaining car to drive that I've ever experienced. Never thought I'd own a car that gets better milage than my Citroen 2CV did. The Prius C is truly a car that makes absolute sense.
Same here, I've had mine for 2 weeks now. Lowest was the trip home from the dealer at 55 mpg. Around town trips have all been mid 70 mpg. Commute to work is around 60 mpg. Three long ~120 mile highway trips this past weekend were 60, 58, 58 mpg. I'm amazed. I've been limiting myself to 62 mph on the highway and using cruise control a lot.
