Are they Texans really Legit?

The Houston Texans are currently the number one team in the NFL based on the power rankings. Are they really the best team in football? The texans are currently playing the best football by far right now. BUT look at the teams they played. Where's the competition on their roster? Until they prove to me they can beat real teams then I don't think they're legit yet. Wait until mid season to judge if they're really superbowl contenders or not...