@Jeff Kershner The Alexa numbers are fun, but I'm sure they are not 100% accurate. Our internal numbers tell a more complete picture with homepage bounce setting a record low in October and, more importantly, delivering a double digit increase in leads to our dealers. The team in Chicago is delivering a pace of innovation -- or more accurately -- a pace of evolution that I've never seen at any company I've been involved with.@Ed Brooks what do you think contributes to those numbers? There are a ton of variable involved, as @Alex Snyder points out. I honestly didn't expect to see Truecar on the bottom. Also - what's the most important metric here?
As to which is the most important metric? I'm a big believer in taking a holistic look at the big picture, so there is probably no single metric that is MOST important (other than cars sold and dollars of profit produced). It may boil down to the intent of the site; if the intent is to help the consumer research and make a decision on what to buy, what to spend, and who to buy it from, then the combination of Time on Site and Pageviews is really key - you're looking at engagement.