Alright, decided to put some work into this.

**The answer is no.**

Perfect IVs gives you HP Dark. I ran a Chandelure against a Zapdos, it used HP. It was "not very effective."

As for EVs, Zapdos ran Heatwave. I did some calculations from the damage dealt, if Zapdos had 128 SAtk it would have guaranteed more damage. (This was an EXTREMELY slow battle xD)

I tested this and my theory was correct. (I also have a Japanese copy, so that is how I tested.)