[quote=Yog Sothoth]
didn't we also run into a timeline issue with the Uchiha being an established clan, and just decided to ignore that?
[/quote]

An established clan with like...five members?

Minemoto: First Hokage, Eldest Son of The Sage, has two kids.
Sangan: Minemoto's son, has at least two sons.
Jin: Youngest Uchiha and Sangan's son.

If that makes them some well established clan then the Bushou must be ancient. :lol