I have been contemplating the blitz theory and don't see it meeting a common sense approach (apologies to original poster if I am wrong). If snatched from an extremely quiet street maybe, but not from a main road.
This would mean having to park a well marked Telstra car on the street, getting out and grabbing a person from the side of road (without them running off), somehow binding their hands or incapacitating them somehow. Then bundling them into the car, fighting, kicking and screaming then getting back to the drivers side and driving off without anyone seeing anything and them not being able to escape. The main road that at least one victim appears to of been abducted from would be far too risky for such an attempt, IMO.
Most likely more than one perp (driver + 1) or lured into the car.
there were no witnesses and no one heard anything, so it just doesn't make sense.