No, that's not it at all.
If you do structured PvP (battlegrounds) Everyone is brought up to max level with everything unlocked to them so that skill and team work are the only things that matter. No one has a distinct gear advantage over other people like in some other MMOs where someone in top PvP gear will one shot people who are not.
In WvW, Characters at max level will have a distinct advantage over people who were say, level 30, because even at max level their gear isn't brought with them up to that point. They will -never- be as strong as you. You just can't half ass it because they can still kill you. They do not get their all their trait points (talent points) either, or all their elite profession skills.