I keep hearing back and forth that DFK is not a burley, but a strain of Virginia, or that it is a burley. Since most guys are only familiar with products made from various methods using the Virginia Gold Seed strain, they are unfamiliar with a whole host of other Virginia varieties that are KNOCK YOU OUT strong plants. Dark Virginia, Orinoco, and several other varieties.
I cannot say for sure, but DFK doesn't "taste" like a burley to me. It tastes like a variety of a dark Orinoco with a hickory smoked flavor. But, I admit, I have no idea what the seed stock is exactly. I mean, I know that it is a specific variety, but I am not sure what category it falls into.
I have five pounds of the Stokkebye brand Dark Frired Kentucky, and I love it by itself or to mix down a really strong twist. I do not find DFK to be an overwhelming nic hitter. It's just a good all day smoke IMO.
Now, there are several other varieties of dark fired leaf, and many ARE burleys, such as the Arcadian burley that they use to cut perique with. And, GH&co has a few that they blend with that taste similar to DFK, but are just smoked burleys. Which makes it confusing.
That all said, if you are a DFK lover, give one of those Drew Estates Kentucky Fire Cured cigars a try. They are delicious. In fact if I could only ever have one thing to smoke for the rest of my days (deserted island scenario) it would be these cigars. Amazing smokes.