The thing is, raw DPS doesn't really matter much in practice, when you're 1 shotting most things. Take a typical encounter in a dougr infested dungeon...
* I enter a room, 3 drougr wake and comes towards me. I use 1 sweeping strike, either taking out all 3 or just a couple. I use 1 power strike on the remaining drougr.
* Next room, there are 2 meelee and 1 ranged drougrs. I take out 2 with 1 sweep and take out the ranged with a sprinting power attack.
* Now I get to the boss room. about 8 drougrs spawn at once and surrounds me. I perform 2 sweep attacks covering 360 degrees which takes out most, if not all of them. I pick off the rest with a couple of power attacks.
* The boss then spawns. I perform 1 sprinting power attack to get close to him, followed by 2 standing power attacks. The boss bites the dust.
All the while I'm doing this, I'm blocking and power bashing any attacks coming my way, dealing even more damage and occasionally disarming enemies too.
So in this hypothetical 3 room dungeon with 15 enemies, I only need to perform about 10 attacks in total to clear the place out.
I'm not saying it will be faster or slower than DW in the same situation, but I don't see the huge DPS advantage everyone's talking about making a significant difference to the speed which I can clear out this dungeon. Like I said, DPS makes little difference when you can 1 shot most things in the game.
The only time I can see the DPS of DW making an impact is when fighting dragons and other uber bosses. Currently it probably take me about 4 power strikes to kill one, which is ~5-6 seconds? Maybe with DW that time will be cut down to 3-4 seconds. However, I'd be loosing the ability to kill 3 enemies with 1 hit, and that is far too big a sacrifice for me personally.
Well, in practice, the damage a two-handed deals is not much greater than what a one-handed weapon deals. However, the speed at which a one-handed weapon strikes, especially with the dual-wielding perks, is far greater. This means that for pure efficiency, if you're going for damage you'll want to go with dual-wielding. Enemies that can take more than a single hit will get one shotted by your power attacks and enemies that can't will get one shotted by your sped up attacks.
Take one of the Redoubt areas, for example, which are full of Forsworn who are all spread out. It will be far easier for someone dual-wielding to sprint to each individual Forsworn and one shot them. There could be 10+ enemies all spread out and dual-wielding will have an easier time moving from foe to foe and killing them all. If an enemy decides to block, boom, one shotted by a dual wielding power attack. In some cases, a power attack from a two-handed weapon will not one-shot someone who's blocking while a dual-wielding power attack will because of how it breaks block and continues to penetrate the enemy.
The only reason two-handed weapons even stay in the race is because there are not enemies which are sufficiently powered to take on the full onslaught of a dual-wielder. For example, there's nothing in the game that can take the sustained DPS of a dual-wielder who pops a level 3 Elemental Fury shout.
You can't really ignore the speed difference between one-handed weapons and two-handed weapons (Especially true with dual-wielded weapons with speed perks). You can't ignore the movement speed differences when striking with a one-handed weapon as opposed to a two-handed weapon. You can go from point A to point B to point C to point D far quicker while dual-wielding. Honestly, two-handed weapons struggle to keep up with damage from a one-handed weapon, let alone two one-handed weapons (dual-wielding).
Why you ask? The same reason why lower tier bows can out DPS Daedric bows. Speed is key. Nearly everything you one-shot with a two-handed weapon will be one-shotted by a one-handed weapon only faster. And if you have no concern for getting hit, dual-wielding is just better.
It's not like I hate two-handed weapons or have a bias against them. It's just that I'm not blind to the truth. I actually started out playing with two-handed weapons for a very long time until I saw that one-handed weapons were just superior in every way and were actually much more fun to play with. Pretty much what I'm getting from your posts is that you can use two-handed weapons. Yes, yes you can. You can also use Destruction magic. Doesn't make them as good as the competition... o.o...
From a gameplay perspective... there's just no reason for me to use two-handed weapons. While role playing wise I do prefer them, my enjoyment is severely stunted when I play with them so I let them go.