I don't see anyone in this thread getting as angry at you as you're getting at them, Kousaka. If it's so insulting to you to have people say that your accuracy isn't as good as you think it is, then prove them wrong - play a real map (do it offline if you're afraid of losing your 100% with your l33t accuracy skillz) and post your unstable rate.
I actually do use local offset a lot and it certainly helps on maps where either the notes aren't timed to the beat or are timed differently than you expect, but if I were to post a thread saying "hey guys, I've got good accuracy, my trick is to use the local offset and you should all do it too!", I would expect the same reaction you got because it's arrogant as heck for someone who's yet to prove they have any special skills to act as though they're better than other players.