Did the Smith and Wesson model 25's in .45 ACP have the oversized throat problems typical of the .45 colt versions?

Yes, there is a number of threads on this issue.

Oversize throats issue was resolved with the non-pinned barrel guns.

Early pinned barrel guns will be found both with and without oversize throats.

My speculation is that those early guns with .452 throats had been returned to S&W at some point for replacement cylinderss.