Well, when you find it, please let me know, because I never have. In 30-odd (very) years in the chemistry/materials science business, I have never seen any scientific evidence for this. In any case, a metal crystalline structure is an entirely random thing - as a metal melt cools, crystalline regions form at nucleation points and they grow until they crash into the adjacent growing crystalline area. The drawing of wire from a metal does not alter this randomness.