I just listened to the live show of TNT (Tim Newton) and he just said at Min 40:55 with DTV you don't even have to do the 90-day reporting. I still can't find the source of this statement.
Why should he, this isn't the most important matter, of course every longterm visa holder hast to file TM30 and 90 days reporting. Why should someone with longterm Visa and even workpermit have to deal with this, and DTV holders don't? There is no sensible reason.