Ah, I think I see your point of view now. You're talking about "weapon delay". To which you are right, it can't be determined if there is and how much it is.

I'm just saying that in it's current form, auto-attack is about every 3 seconds.

As far as weapon delay goes, we don't even know if it exists yet. The Development Team would need to state something one way or the other regarding that facet of the auto-attack subject.