Lumia 950 fast charging on qualcomm QC chargers?

[simbadogg]

So I guess the Lumia 950 and 950 XL don't support qualcomm QC, but if i'm not mistaken the charger with the Lumia 950 ships with a 15w charger. I'm looking at this aukey QC 3.0 charger that does 19.5w max, my question is...do QC 2.0/3.0 chargers only supply this higher wattage for QC certified devices, or will they allow the Lumias to take down the maximum wattage they support.

Not sure if anyone has experience using QC3.0 on a Lumia.