From lab-scale plants it's clear that they are at least as resistant as the chinese chestnut the fungus is from. http://www.esf.edu/chestnut/resistance.htm

Of course the proof is a forest of full grown trees, but there's every reason to expect this method will get us there.

You can be pretty certain the plants they've got are extremely resistant.

They designed a brand new type of testing for resistance to be able to make the progress they've made as quickly as they have. Instead of testing a whole tree they can effectively test blight resistance on a single leaf, allowing their time between generations to be measured in weeks rather than years. (Time to first leaf, rather than time to whole tree).

I hope that you and they are correct, of course. While reading through the information the NY organization had sent, it just appeared that they were less certain than that.

I am very excited. What was strange is that in order to accept the trees, you had to agree to an entire set of restrictions. You can not sell any nuts was one; another was you must cut down the tree if you ever sell your property, I suppose there is an exception if the new owner also signs onto to the agreement. Seemed a little awkward, but still worth it.