I saw this Dataium/Cars.com study a while back. I'm surprised that it hasn't received that much attention. None of the Internet related sites, that I frequent, have mentioned it. When it suggests that dealerships could be wasting a huge percentage of their internet budgets, it really is a big deal.
I have been following this "Big Data" technology for a while and I believe this will change many of our perceptions of consumer behavior on the internet.
If you haven't had a chance to look over the Dataium/Cars.com Study:
click here.