Kafein and Rangerbob already covered it pretty well but I'll take my own shot at it.
2h have the best generalized dueling weapon in the game (longsword/heavy bastard sword.) Given the dueling swords raw ability (speed and stab reach) there should always be some talented users on the field (you can make arguments for some other 2h as well) but in general the majority of players should be using polearms due to their extreme utility.
Polearms have: Balanced shield breakers, the superior can opener, the long spear, the ability to overhead through teammates, and the ever popular polearm stun.
The only real challenge for polearms is internalizing your weapons true reach. If you aren't using the long spear then just remember that all 2h that can stab get to alpha strike.
1h
Overhead = +0
Left-to-right = +0
Right-to-left = +19
Thrust = +61
2h
Overhead = +15
Left-to-right = +17
Right-to-left = +13
Thrust = +80 *With the new animation we should try and test this on the duel server. *
2h Polearms
Overhead = -15
Left-to-right = -7
Right-to-left = -2
Thrust = +19
1h Polearms
Thrust = +50
It was mentioned that for lone wolf play 18/21 with a 2h is great but I would submit that 18/21 with a bec is just as good and so long as you can stick near a couple clanmates (yours or any clans) who are working together the utility of polearms makes them superior. The sooner you stop being mad about all the great perks polearms have and accept them the sooner you can build some truly scary group compositions that mix all the great perks of polearms with a few scary swordsmen.