Tom,
Sure he was..... he shows it clear as day in the Ed Sullivan clip saying the elbows are attached and the swing is just around and around and in his book by talking about elbows down at hips....... you can't help but pack the upper arms in with these thoughts or feels.
Take a look at the sequence below from Augusta range session
The big thing I notice here is how minimal the hand travel is from frame 1 to the middle frame. The hands have moved maybe 6 inches at max....yet the clubhead has moved what 4 feet? or more.... that is actively firing the hands and he wanted 3 of the right variety...but it isn't throwing the hands it is rotating them by having a huge range of motion option available in the body.....because the torso/shoulders are closed off (frame 1)....so they have somewhere to go.....
Look at the difference between the shoulders in each frame.... they are the range of motion....the hands and arms stay packed and enjoy the journey without the fear of them overtaking matters.
Even in frame 3 you can see how much the shoulders are still turning around and around, hips have not stopped they are joining in on the procession.
Again the hands have not travelled much whatsoever from left frame to right frame (maybe 18 inches total) and the clubhead has been moved 6-7 feet in radius
This is something we jump straight into in drill 1....to learn to use limited hand travel for a late strike with range of motion options to get the body moving and to
STOP swinging the arms and hands void of body action that the poor golfer so enthusiastically wants to do...