All excellent points, and no doubt that A&S has many loyal customers, attracted by the idiosyncrasies and sweater-like comfort.
In my mind however, making a distinction between a bespoke coat with shoulders that don't act as a secure fulcrum from which to drape the garment, purposedly, and a softly constructed RTW garment that is one size too large in the shoulder area, by accident, isn't that easy.
Very true.
Infact, I don't even have to go up one size in RTW.... a size 50 in some of the Armani coats fit me just fine and fit me similarly to the AS in chest/shoulder. And with equal comfort and movement as well !
The jetted pockets on the coat in question were made in the distinctive A&S way - vertical matching stripes, and it's worn by an A&S staff in the A&S premises. I just don't know why the poster was so adamant it's not an A&S.