True, but I would argue that this isn't a bad thing. There were various sects of Judaism during the days of Jesus and He never made a judgment on which one was the "right" one. Different denominations have different purposes -- Baptists are good at reading the Bible and evangelizing, Pentecostals are good at praise and worship, Greek Orthodox are good on the mystic aspects of Christianity, and Roman Catholics are good at Inquisitions (just kidding on that one, Black Elk!!!!!). I don't think that God cares too much about our denominations.
As for the other demominations you mention, Jesus said there was one way, not the Baptist, Catholic, Pentecostal or Methodist way. One way. Which of the above do not follow his way to the letter.