David, 

Congratulations, you brought the article to the table I knew one of you simpletons would. Allow me to debunk it. But first, in terms of your lag model of CO2, that's from one study that cited CO2 lagged behind warming 420,000 years ago. This is as expected, as other forces would cause the planet to warm (and I don't think there were any cars back then, I'm not too sure, did the humans that weren't around drive them?), eventually releasing CO2 by way of more sources being revealed. And that lag study was found to be highly inaccurate, with a lag of 200 years rather than the mentioned 800 - 1,200 years.