I'm thinking about brewing this, so I picked up a Samuel Smith's Nut Brown Ale to get a feel for the type. I have a cold and I'm sure I'm missing some of the nuances, but it's good stuff. I think I like it best at almost room temp....
I went to a couple of rating sites to read some reviews. I love those places. No matter what beer is being reviewed, 'that guy' is bound to show up sooner or later, and say something so entertainingly stupid that even a novice like me can enjoy it.
One reviewer apparently thinks nut brown means the beer has nuts in it:
Pours nice dark amber colour, malty aroma, but other than that it’s pretty boring. Nuts come out a little bit with the bitterness. Boring, generally
Another one apparently believes it's a modern knock-off of genuine English brown ale (apparently he has no idea it's been brewed since the 1700's). I couldn't find that one again, but he carried on about modern brewers cramming oatmeal, nuts and everything else into classic beers, and said if he was served this stuff in a real English pub, he'd feel cheated out of his money.
Of course there were also the usual suspects who taste entire roadside produce stands stuffed into the bottle. One guy listed salted peanuts, chocolate, caramel, dark malts, dark bread, dark chocolate, more caramel, dark roasted grains with a smokey note, raisins, plums, sour lemons, vanilla, chestnuts, walnuts, almonds, more salty peanuts, leafy English hops, mild bitterness - and that was before he started discussing the aftertaste.