Can't say I've noticed such a thing. I really enjoyed Salt when I tried it, that was just in January, IIRC. I don't get to try a lot of new places in general (my husband is a picky eater so I have to time things correctly to suit him and our pocketbook). We had some really good stuff in NYC when we were there in Jan, too. We also had some so-so stuff. But then it WAS NYC.
I need to get my hands on that indian food the woman in Montpelier is making. I keep forgetting about it 'cos you need to order it well in advance.