The counter service is pretty much on par with the prices at Disney. The restaurants, as a whole, are a little cheaper than Disney.
Examples of prices: Hamburger, fries and drink will cost around $8.00.
Hot dog, chips and drink will cost around $6.
Most full meals like BBQ ribs or fish or chicken with fixin's like cornbread, cole slaw, or corn on the cob, costs around $12.
Full service restaurants like Finnegan's will cost around $15-20 a person.