Further backing up my claims, take a look at G33ke's quick analysis of how I fight sword-wise:
"Minecraft PvP can be...complicated to say the least. After much fighting with Sixzo, we've come to realize something; Sixzo's first hit in a fight generally hits you before you hit him, the reason being that his aim is generally right on the spot. This means he technically has a miniscule amount of "reach" more than most people do for the first hit: Since he gets his knockback first, he generally pushes you farther back than you do him in a fight, and often times he'll get an extra hit. Trying to fight for too long without running off as well will put you in a type of "combo", very similar to the combo my fishing rod puts you into if you aren't careful. (Or at least it's something very similar to this, with him being able to better track the closest point of a hitbox better than most people. A lot of times when fighting him, it feels as if he has "more reach," the reason being that he's actually hitting the closest hitbox on you but you aren't doing the same back quite as well.)
This combo is pretty much the idea that you took some knockback and are moving backwards or not at all in the air for a short period of time. During this period, the other person has a bit more "reach" because you are moving backwards/in the air when they are moving forwards/on the ground. (Even heard of the underwater trick of going underneath the opponent? It does take affect here ever so slightly: the fact that the opponent is in the air a slight bit takes affect just a bit.) Long story short, it feels as if they have more reach when in reality they just got you in an unfortunate situation. (Currently, whatever Sixzo does to make this happen in melee is the only reliable way to make this happen without using the fishing rod the way I do.)
Because of the fact he sometimes hits so well, this means lag can really effect his PvP. Generally, lag will just make where you actually "hit" the person be slightly off, but because he's sometimes hardly hitting them anyway..it can suck for him sometimes. This makes fighting on EU hard for him. A normal player, however, will still hit the "edge" of the player more easily.
I'm also pretty terrible at it on EU. Whenever I actually do try, I can hardly hit people most times, (if someones sprinting I almost literally can't hit them unless they are coming directly at me.) and I wobble sprint like crazy. Although this is because I'm even farther from EU than Sixzo is, I don't even try.
What with lag, I think this is more inaccurate than it would be...but even then there'd be a split of regional "who's the best"...This is why it's really hard to really say anyone is the "best". There is good, there is really good, there's "better," but there's no "best."