I don't necessarily agree that you should always put the border on top (with the rest of the quilt against the feed dogs) - I think it depends upon what you're sewing the border to. If I'm sewing a border to bias cut edges, the border is what goes on the bottom. Really you want the least-stretchy fabric to be against the feed dogs.
I do agree that borders cut the long way stretch less. And starch never hurts. ;-)