Look to Gnjus. He is 1-shot capping experienced 2h/polarm blockers by a surprise left swing to their head all the time.
Gnjus has low ping and lots of experience. Also he's using 1H AXE not 1H sword.
I'm using Side Sword and have 60-80 ping. Side Sword is almost useless for me because of high ping. I do much better when I'm using Long Espada Eslavona because of invisible reach.
Scimitar, Elite Scimitar and Long Espada are the swords I've used which have invisible reach. Side Sword doesn't have that "feature".
My build is kinda crappy, I'm archer and shielder hybrid. I have 111 wpf in 1h and 125 wpf in archery. As an archer I perform much better, have better k:d.
My previous build was 2H and I used Katana for two days, playing as a ninja. Despite the fact that you have to manual block, playing as a ninja I performed much better than I do as 1H. Facehugging with high ping is dangerous thing to do because of 2H sword animation and lag. So many times I've raised my shield just to be slashed by greatsword spammer, he slashed me like I had no shield at all. Shield isn't always advantage, especially when you're dueling 2H or polearms user.
Also, stats have nothing to do with the situation on battlefield. 1H swords aren't fast as they should be when used without a shield. Side Swords 102 speed (I have it heirloomed twice) don't feel much faster than Long Espada Eslavona's 98 speed. That's because of shield which negates most of speed. They could buff Side Sword to 105 speed and difference wouldn't be great when used with a shield. Also when you put shield on your back you ain't faster than with shield in your hand.
Side Sword has real 95 length
Scimitar has 97 but feels like 100
Elite Scimitar has 100 but feels like 103-104
Long Espada Eslavona has 103 but it's more like Longsword in length
Katana is 95 but feels like 98-99