We did this a few trips back - to my DHs delight =) We actually did it on Mothers Day with my mom and it was one of the best days we'd had at Epcot. Not because we were all feeling really good but because we devoted an entire day to taking our time and taking in the sights.
We only missed a few countries (like America, why would I waste time on a Sam Adams? Ick!) but for the most part, we had a snack and drink in each country. We usually split - to save $ and sanity. It gets very very expensive!
We went for the F&WF the next trip and that's really the best place to do it because the portions are smaller and cheaper but oh well. We enjoyed the full size portions =)
(we alternated between wine and beer)