We got a corn dog at Corn Dog Castle in California Adventure. It was darn near perfect. The outside was dark brown and crispy but the inside was creamy/fluffy and warm. The dog itself was very good, well seasoned and juicy. My mom and I split one (along with chips and drink) and it was the perfect lite lunch/snack for the two of us. However we are snackers and it's really a one person meal.
My mom hates turkey and could not tell the difference, I will probably never tell her that Disney uses a turkey dog. HAHA. Personally I like turkey dogs.
Ours was not greasy and just a cultural thing but as soon as you put sugar in corn batter it's a muffin, not bread. I can not even imagine a sweet muffin taste on a hot dog.