The Californial based firm Brennan, Weiner and Simons is representing individuals in a claim against hybrid car manufacturers, specifically Toyota, for making false MPG claims. Interestingly, it is the US EPA that conducts the test by which the window mileage is derived.
To scrounge up plaintiffs, I had noticed that the law firm had purchased search listings on Google's AdWords system. You've got to wonder the motivation of the law firm when the attorneys are seeking clients to represent, instead of the other way around.
The suit brings up valid point though: should hybrid manufacturers voluntarily report their own mileage, as the EPA tests have consistently been known to overstate mileage by up to 15% on all vehicles?