Cornell is not really useful for this kind of thing IME because they are talking about one thing and not basing it on actual field conditions, probably. Otherwise it would be obvious in their guidance that vigor and high yield is a big part of how a tomato is effected by early blight. I have tried varieties that were bred for immunity but whatever I grew was worthless for my purposes due to flavor and the fact that it was probably a determinate variety, which might be good for you but not very useful to those of us who eat lots of tomatoes raw, off the vine. They are more for the industry, IMO, because they can be mechanically harvested as most of their fruit ripens at the same time.
Country Taste is exceptionally vigorous and when I give it copper sprays through spring it has produced perfect looking and nice tasting tomatoes until the weather gets too cool for several consecutive seasons. Like Carmine in the realm of red peppers, it is in a class of its own as far as productivity here. This is out of a field of probably 50 varieties I’ve tried over the years. With Carmine, I didn’t even bother growing any other varieties for the last 2 seasons because it is both the sweetest AND the most productive sweet pepper I’ve ever grown. CTaste only wins the production category.