This is where lag comes into play HocBao. Because he shoots what he sees on his FE and you don't see where he is for a half second or more, a bogey closing on your six is always going to be closer than he looks, and if he is pulling angles on you, he will have more angle than it looks like.
You must take this into account especially in merge situations where your opponent takes a head-on shot. The high closure rate makes the range difference even larger, so you need to start your evasive and your merge move earlier than it "looks" like. I normally start a HO evasive at 1.5k or so and hit my turn actually before we pass at between 300 and 500 yards depending on closure speed. You allso need to take lag into account when somebody is on your six, since if they are closing they will be closer on their FE than they appear on yours, and can have a better angle on you than it appears as well. For this reason, you need to guess a bit and hit your evasives at slightly longer ranges than you would think.
If you think about the issues involved in a global network like this, it's actually amazing that it works as well as it does.