Judging from the unknown names they can't kill anyone with an autoblocker either.
I challenged Shaska to a friendly duel earlier today with 10k on the line just for fun. From what I saw of them in battle I figured they were a new player and I was going to teach them the basics and help them out. I start fighting them and they were AMAZING. Blocking EVERYTHING nearly, except when I managed to fake them out with a bit of 1 handed ghost reach or a well positioned feint. They beat me easily first round when I used steel pick. I switched to longer range 1 handed and managed to beat them for the 2/3.
I didn't make them pay the lost bet because I felt bad for them and they put up a good fight, and I left feeling like I was a poor judge of skill from watching them in battle because they dueled VERY well. Next thing I know they're banned for using autoblocker.
I consider myself a solid player, not a GOOD player though. The fact that I beat them even with autoblocker shows they weren't good, and that autoblocker isn't enough to make someone skilled. If someone is bad they're going to have poor performance in battle even with the blocking.