Well for my part I think that there should be a qualifier on Postmillenialism mainly to make a distinction of historic (aka pre-Rushdoony) versus Theonomic Postmillenialism. I've read Matheison's book and I wouldn't say that he doesn't emphasize the "golden era" more like he assumes that the reader knows about it and goes on.

Peter

If you believe what you like in the gospels, and reject what you don't like, it is not the gospel you believe, but yourself. Augustine of Hippo