All of these things I know already, but I was just pointing out that it would make more sense if you could swing a short weapon faster than a hand and a half weapon. Following this logic I would say that Two-handers should take half again as long to swing as a hand and a half weapon.

So to start I would suggest:

Short = 2 sec
hand and a half = 3 sec
two-hander = 4 sec

At level 25 I would suggest:

Short = 2 sec
hand and a half = 2 sec
two-hander = 3 sec

With no other delay drops past 25.

Never could understand why it is just as fast to swing a two-hander as it is a short weapon...always seemed kind of stupid really since in most cases you are talking about a minimum of 500% increase in weight. 2.5 pound short weapon and 25 pound two-hander could never be swung at the same rate and would also take more energy to swing the two-hander.