I don't think "The Wall" sounds anything but British.
A lot of the plot and themes seem recycled from "Tommy" in fact (daddy died in the war, why doesn't mummy love me? I feel alienated from the rest of society so I'll become a "pinball player who starts a church"/"rockstar who starts a political party". But it all comes crashing down in the end.)
Speaking from my own experience -- I was 10 when the album first hit. LOVED "Another Brick in the Wall", in fact it was one of the first "radio songs" I got into -- cuz what schoolkid isn't going to love a chorus like "we don't need no education / teacher leave those kids alone"?! Shooting fish in a barrel with that lyric.
Didn't hear the rest of the album til age 15, at which point I listened to it obsessively for about 6 months. I think that's the right age to be appreciating "The Wall". It probably was one of the first dozen contemporary albums I owned (most of the rest being by The Police or REM.)