Brian McLaren On Orthodoxy

Is there really a historical orthodoxy or is there simply our impression of what we think is historical orthodoxy?
“I am deeply committed to doctrinal orthodoxy, meaning I want to be faithful to the truth and to the Father, Son, and Holy Spirit, even if that puts me at odds at certain points with what this or that group has determined as doctrinal orthodoxy. For example, my Calvinist friends who claim orthodoxy need to remember that to the Eastern Orthodox, Calvinists are heterodox from the get-go, because they’re not submitted to the patriarchs and bishops of the One True Church. And my many Wesleyan and Quaker and Anabaptist friends who consider themselves doctrinally orthodox are only questionably so from the perspective of some of my Calvinist friends. And my Dispensationalist friends often speak of “historic orthodoxy” without noticing the irony that before 1835, their approach to the faith had never even been dreamed of. The same could be said in slightly altered ways for Adventists and Pentecostals.”
Brian McLaren, interviewed by Melvin Bray
Love him or hate him, Brian has a way of speaking what is one of the primary tensions in Christianity. There is so much orthodoxy, can we really say there is a historical orthodoxy?