Darryl Siry, EV aficionado and former CMO at Tesla, was quick to call the 230 number "unrealistic," adding that, "the problem is that anytime you try to get to 'miles per gallon' using vehicles that don't necessary use 'gallons' you end up in a very strange debate with very strange outcomes." Indeed. Siry made sure to say that it's the EPA method (still in development, and one we don't know much about yet) and not only GM that's to blame here.
Over on What is 230?, someone who claims to be a "GM employee who works directly with people who work on the Volt" wrote in to say that the number is a "mis-leading gimmick of a marketing tactic."
In the least surprising response, Bob Lutz has nothing but good stuff to say about the 230 campaign and the rating. He says the hype was made "For one simple reason: We're proud of it."
[Source: Darryl Siry, What is 230?]