Ha, I think George is right... it sounds like there's quite a different standard across the country.
In New England, when you are shopping around for houses and one seems a little cheaper than the others... often it's got electric or it's on a slab foundation. Electric gained some popularity in the 70's and early 80's around here... but it's relatively uncommon and a huge drawback in the market. It's not for vanity either... electric is by far the most expensive per BTU. People will upgrade their systems from oil to gas to save some money... but even oil is much cheaper than electric.
Again, in New England, it's typical to have the tenant pay utilities. If that's gas, oil, or electric, it's really no difference. Sometimes places include heat, but I'd guess the tenant pays more often than not (I've only lived in one apt. when it was included).
Interesting... but nonetheless, if I were renting your place, I'd rather pay for oil than pay for brand new electric, as it should still be cheaper. Jacob makes a good point about having the tenant pay vs. paying yourself... that's true for whatever heating source you use though.