We have a hard time telling if they ARE intelligible or not as they all seem to mumble. We KNOW it's NOT our hearing that's going as we can understand lots of trad singers, old movie singing, CDs, even Dylan, well most of the time it's his older stuff we can understand, but the modern stuff, forget it. I don't think any of them know how to enunciate or phrase any more!

I also listen more to the tune than I do the words.:-)