Unless you are using a 3d 1h, why is anyone trying to outreach 2h users with a right swing? Stab is faster, has more reach, and usually does more damage. Right swing is a good way to mix it up if they are blocking your stabs, but usually 2h users' hubris makes them think they can just spam sideswings at max range (without having to block) when facing a 1h user. I stab these guys all day until they get wise and play more defensively.
I'm always amazed how many 2h users refuse to accept that they may have to block first when fighting a 1h. Sometimes I get unlucky and my stab glances while their sideswing connects, but that's rare. I'll even try to open with a stab against longsword users holding a stab (although that's only a 50/50 proposition) but at least my stab does more damage than theirs.
As strange as it sounds, 1h animations are actually better set up for max-range dancing than 2h. 2h performs much better in facehug range though. Totally backwards, but that's Warband.
First, stabs stopped outreaching right swings when Tydeus fucked up the stab sweetspot curve. Unless you are hitting a naked guy, of course. Even worse, a bouncing stab is a free hit for your enemy.
Second, it's not hubris that makes 2h think they can just spam sideswings at max range. Against most of the playerbase it works. And considering many players don't know any better when they play 2h, it's commonplace.
Third, you can count on the psychology of your enemy and trying to use his expectations against him. But that's still just a gamble. Especially if the enemy has a stab ready, you won't be able to react in time if he releases.
Fourth, 2h have the best squaredancing setup, first and foremost due to the godlike thrust. That doesn't change the fact that 1h have three unreliable attack directions at facehug range instead of just one, and therefore need more space unless ataspamming their way out of everything.