I told him the opposite in a PM... but then again I haven't hunted open country like Missouri.
Missouri, at least 3/4 of it and down in the Ozarks where I hunted is far from open, it's thick hardwood forest, small mountains/hills. I think they are just a much louder bird, the Easterns, then the Merriams are, especially up in the thinner mountain air. Just one guys opinion. This was also the case comparing them with the Easterns in Virginia.