Great! Thanks for the link
Another detail on FMTY is that the bass made the solo with the guitar and the harmonica, playing unison but an octave below. Listen!
The thing though is sometimes we put to much into stuff. I'll use Nelsons statement as an example for where i'm going with this. The Beatles did things because it sounded cool or good like the solo mentioned above, but they really didnt know what or why they were doing it most of the time. Their musicianship just wasnt that good for them to go around doing things off the cuff on purpose and understanding why they were doing it. Like the bass being an octave below as mentioned above, i'm sure Paul was trying to figure out that section and found that what he played sounded good so there it was. Now we have musical theorists coming in and dissecting everything and telling us how genius it was when in truth, it was just probably one of the lads playing something that fit the song after a few trys.
I guess the point i'm trying to make within my poorly worded paragraph above is that we tend to sometimes make things out to be greater than what they truly are. The prior analysis for 'From Me To You' by Pollack in this thread is a good illustration. He took a three chord pop song and broke it down so far that it seemed like it was something that took Beethoven several years to compose. Theres just no need to take it that far.