Pat
Yes they are. I have mine picked up on halves when I have a good crop. From what I have been told most go into cookies around my part of Ok.
I would still like to plant an orchard but it is a big investment. if a pecan tree comes up in the right place ( not too close to other trees)I will put a post by it so I don't run over it and hope it grows.

Texas A&M said no native tree is the exact same I have some trees with good size for natives and some small.

I have an old pecan tree that has never produced a nut There is a hole in it and there is no telling how many squirrels have been raised in it.

A good pecan farmer would cut it down I just cant do it.
I also don't do this for a living.