I've wondered about this too. Also if you can get lower than 6 watts using VV mode.
It has an amp limit of 3 or 3.5 (can't remember) but in VW mode it will only go to 11 watts. But in your example it's not going over that amp limit. I guess the question is will the wattage or amperage limit kick in first, does the wattage limit even apply in VV mode?
Hmm... maybe test it the voltage it's putting out with a multimeter somehow. I'm not sure how though, mine doesn't have the little clamps and it seems like it would take 3 or 4 hands to do it.