Just got back from my trip to DC. Wasn't meant to be a food trip, but I made it one.
Very, very good. Better, more consistent food than my trip to Dallas overall (at least in the upscale dinner places -- and my very dissatisfying meal at French Room has a lot to do with that).
However, I have to say that Lola still shines. Inn at Little Washington is a better restaurant and the food was all fantastic, but the Tasting Room at Lola was right there and in some ways exceeds I@LW. Lola is clearly a better value with 15 courses at $65. And I think that Lola better balances flavors, textures, and colors than any place I've been so far. So get thee to Lola!
It was interesting going to Vidalia after just going to Mansion since both are doing upscale American regional cuisine (Mansion, of course, does SW while Vidalia just does southern/soul food). Mansion is probably a better restaurant overall. And their bison dish with the pozole and crayfish enchilada was better than anything we had at Vidalia. But on overall, I think Vidalia is right with it. I'd put them as equal on food (having only been to each once). Then Vidalia gets the edge because of price (most things under $30 on the entree menu) and comfort (business casual). Regardless, if you're a Mansion-lover and you go to DC, definitely try Vidalia. It was my favorite restaurant in DC.
One thing I think you people in Dallas should take note of: you have high prices. I expected DC to be as high or higher than Dallas, but overall I'd say they have lower prices on their upscale food. That definitely surprised me. They were barely higher than we are out here in Portland.