What guy? What DTV were these people going after? The reports I've read and guys I've actually spoken with have not had any issues getting the DTV for remote work with only a current back statement.
The 2 guys that I've spoken with from the US received their Visa's within 15 days using only the documents stated on the consulate website, nothing extra as Vietnam requires. If someone wants to snag the DTV quickly then go through Laos and not jump through hoops at the Vietnam consulate.