I'm probably being a bit picky, but I think your summary of the Garden Professors post is a bit misleading. The Garden Professors are primarily talking about trees used in urban forestry, not plantings in general that might be used by home gardeners. And their argument about biodiversity relates only to greater diversity of non-native trees, not greater biodiversity of native insects and birds. While I agree that natives may not be the best choice for every situation, most of the time they are best choice for biodiversity and resource usage.
Yeah, I think it's safe to say that using native plants is just about always more environmentally friendly than the alternatives. I just like to point out stuff like this to encourage people to be thoughtful and not get ossified by environmental dogma.