Quote Originally Posted by Ken White View Post
True -- but that's when WW II was 'decided.'
In the American world view ... because they showed up too late to play a role in the widely recognized turning point battles...

Uh, no. That's rather incorrect...

The US had adopted the 90mm as Standard A in late 1943, production started on the 90 mm M3 towed antitank gun, on the M36 Tank Destroyer and on the M24 Tank.
Aside from the M24 being equipped with a 76 mm* (based very much on the first quick-firing gun ever; a rather weak calibre comparable to the T-34 M1940's gun) and 90 mm guns playing no role in U.S. WW2 mediums, I think you read a bit more into "insistence" than I meant to.
The U.S. kept 76 mm as a calibre in the M41 and in some post-war prototypes, and the ~76 mm-equipped Shermans were the almost exclusive medium tank of the U.S. until the Korean War wartime production mode kicked in.

*: I think you meant M26, which saw WW2 only in prototype-like quantities.