WASHINGTON (Reuters) - General Motors Co's mostly electric Chevy Volt turned in a lackluster performance for efficiency in its first series of road tests by product raters at Consumer Reports. "We would have really liked to have loved it," David Champion, director of Consumer Reports auto test center told Reuters on Monday after announcing the organization's top picks for 2011. "It was fun to drive and the ride quality was pretty good. But when you look at the finances, for us it doesn't make any sense," Champion said. He said consumers seeking value and top fuel efficiency would be better...