Well, with just the kit lens - that DSLR would be more like a pointlessly complicated point and shoot. If they are using the camera like that, then theres really no point in the upgraded camera body, they'd be better off with something like a Canon SX20 or something. Or an elph.Perhaps we're forgetting about the people who just use dSLR's as sophisticated point-and-shoots. The ones who buy the kit, photograph their kids, take them on vacations, and shoot birthday parties. Never comes out of AUTO or P, not very techie and so not likely to have any other lenses. I imagine this group makes up a substantial percentage of camera buyers.
*edit - "complicated" isn't really the best word for what I meant, I think "hassle" is more correct.