Okay, I owe Ed Rhodes a big apology. You're most certainly correct! I just scanned through nearly the entire set and that's some of the most narrow stereo I've ever heard. It's not until the sixth session (3/14/61) that I hear any seperation and then, it's only on the track, "Those Who Sit and Wait." Then on the next track, it goes back to that narrow stereo. Hell, it might even be mono...a listen on headphones might reveal this even better.
The live session at Birdland that closes this set is definitely wide stereo, but borders on distortion...
Please forgive my impulsive decision to be flip. You are so right...