No, I mean almost precisely the opposite. When in Milan recently most high-end shirts were button cuff with what was very similar to a moderate spread collar except instead of being ramrod straight at the front it was gently curved. Apologies, but I've been looking for an example photo and I just can't find one!What do you mean by curved?
Are you referring to those curvy collars that in the States are called "Riley collars" after the basketball coach Pat Riley (known for favoring the style)?
Or do you mean "curved" in some other sense?