I think the author meant single load (load one page, fetch the rest by async javascript). But as I've commented, having built edgeyo and Strangers for Dinner a

I think the author meant single load (load one page, fetch the rest by async javascript). But as I've commented, having built edgeyo and Strangers for Dinner and having tested in-page (iframe) and redirected authentication, redirected authentication seems to garner more trust