Toob, I've got theories, but they upset folks when I talk about them. I'll just say that in my own curing and aging of my own crops of Virginias, that by just pushing out the ammonia naturally, I get a noticeable turn from ammonia to vinegar. A sweet vinegar. Now, to me, and I don't mean to upset anyone, but it suggests that McClelland and maybe a few other blenders are using a slower, more natural means of preparing their Virginias. Mike of McClellands has said over and over that the sweet vinegar flavor of their Virginias is all natural. So, inversely, maybe a few other blenders are rushing the process, or using casing, or just putting out a Virginia that hasn't had the TLC that it could have used. I know in talking to a few guys in the industry that "some" of them just use Virginias straight from the farmer. Or, they suggested as much.
But, I will smoke quite a bit of Virginias that aren't McClelland or one of the other vinegary blends by other companies. Variety is the spice of life. And, I'm sort of glad that they all don't do it the same way. However, if asked, I will always say McClelland makes the most magical Virginias. But, the rest of them are pretty good. ,