What is the attack speed of daggers?

Swords and axes are around 1.33 secs per attack, last I heard.
But what about daggers?
Also, because you have two daggers, that means one attack is actually two hits, right?

If so, that means that daggers would be by far the best weapons for a zealous modification?

Thanks.

They are 1.33 as well.

No, there is only one hit every 1.33 second, but invesing in the critical strikes attribute increases your chances of scoring a double strike (two hits in one). Some skills are also automatic double strikes (dual attacks).

So a double strike or dual attack will net you +2 energy from a zealous dagger?

and +6 from a vamp dagger, yep

Actually, investing in dagger mastery will increase your chances of dual attacks, not critical strikes.

On that note a lot of peolpe also overlook that Dagger Mastery not only gives a 2% dbl strike per point but it also gives critical strike bonus