Can dual blades save points between jobs?

There's been a lot of talk and analysis, but I still don't know:

If I buy mastery books from the cash shop, can I save points between jobs? Namely 3rd -> 3rd+.

More specifically, will this guide still work?

Sorry for the cross/double post about this, but I think noone really knows anymore...

kMS switched this around so much, they even had to give away full-SP-reset cards to their players.

The only thing we can do is wait and see how gMS will implement SP saving for Dual Blades...