Old man reading iPad tablet computerEarlier today, I stumbled upon yet another article about yet another e-reading study. True, that's not exactly breaking news. But because the theory preposed by the market analyst firm that conducted the study was definitely one I'd never heard before, I figured it was worth sharing. Before I explain the study's findings, though, let me say—and I've said this before in this space—that I don't really have a whole lot of faith in most of these research firm. But then again, who knows? This one's goofy enough—and simplistic enough—that there may just be something to it. Here's the bottom line of the...