Now don't get me wrong but a different american dub is doing a better job. That dubbing is being done by FUNimation and is being released on DVD. FUNimation is dubbing it the way it was intended to be. Season 1 First Voyage is already out on DVD and Season 1 Second Voyage is coming in September.
Say are you watching the One Piece series from japan? I hope you're not watching the american 4kids dub version. From what I heard 4kids did a terrible job in dubbing it. (boo! hiss!) And what's worse, they had to leave out the Little Garden arc leaving a BIG plothole.