I noticed about a foot of independent movement between the hulls on my old boat before I epoxied it last year. I glued everything and the difference is night and day. Much better. If it's just 6 inches, I would still think about doing it(This is my opinion based on how much better my boat sails now that it is glued tight).
The only reason not to glue the pylons with the frame is to take it apart later. If you are not planing on taking it apart later I would strongly recomend you glue the whole thing. I too used the article you mentioned, and with two people it was pretty easy.
If you didn't end up gluing the pylons, you could use cut-up plastic milk jugs as shims to tighten that connection, but they will wear out pretty fast, so you'll have to do it a couple times a season to keep the boat tight.
Hope this is what you were looking for, andrew