The Geico insurance people had the chance to keep camels in front of folks, but lost 15 percent of their credibility when they chose a gecko instead of a camel for their mascot several years ago. I thought their ad showing Caleb the Camel clopping through the office to ask workers if they could guess “which day is it” to be pure advertising genius. It made us smile, and had tens of millions of “hits” on the Internet. Caleb “yucked” it up, announcing Wednesdays to be “hump day.” (My guess is that most Americans clearly remember the commercials, but not necessarily what ...