Scroll down. If this is what they go by I will not go see it. It is canon because it was in Star Trek III The Search for Spock when the refit enterprise was pulling in space dock. It is to the left of the Enterprise. Click on the Picture to look at it. I never noticed this ever. I was focused on the Excelsior. Could this be what they use and are refering too but modified? It Delta wings look like it is from the old Valkyrie Supersonic Bomber that was discontinued in the early 70s
http://www.ex-astris-scientia.org/articles/wolf359-other.htm
http://www.ex-astris-scientia.org/articles/wolf359-other.htm