Interesting, thanks for posting. I suppose it helps me emphasize that the Leaf, the Volt and all other modern vehicles with decent data upload capability could become de facto competitors to this type of portable meter, for the time when the vehicle radio is used, though not outside the vehicle.
I want to add that at some point I was chosen preliminarily possibly to participate in Nielsen (I think it was) but ultimately couldn't do it because of a work affiliation. Ok, they have to follow their rules to maintain their reputation and to do their work in a way that is scientific as possible. However, I think it leaves the door open for a company like any major auto company to offer drivers the chance to participate in something which may or may not be as useful as Nielsen data, but which could have access to a much larger sample set (by number of units) and whose data might be valuable to some even if the collecting of data is not useful for some rigorous scientific purposes. It also might be fun for some drivers and their families and thus add (in a low cost way) to the overall enjoyment of features of the vehicle.