I showed the chart that is posted in this thread to a friend. This is what he had to say about some of what he has read in this thread.
The problem I think is the op of the chart says the device doesn't "down regulate" and only "regulates" above battery levels. Sounds to me like he's talking about "boost", not "regulation". Or at least only talking about true watt monitoring & regulation. If you have the ability to regulate the voltage to say 3.0 volts (which I think the iStick can surely do) and send it to a 1.8 ohm coil, as long as your battery is at least 3.0 volts or higher, Ohm's law says you will only push 1.66 amps through the circuit, which is 5 watts. It's regulation regardless as long as the device keeps the voltage at 3.0 volts and the coil stays at 1.8 ohms as it heats. Same for a 2.1 ohm coil regulated to 3.0 volts for 1.43 amps giving 4.3 watts.
True that in the last example it may be regulating voltage rather than watts, but it's low watts (4.3) and regulation nonetheless.
I haven't tested a darn thing, just using logic. And besides I think I'm a low watt vaper at 5 to 6 watts, and sensitive to burnt juice. In the am when I wake up and am most sensitive, my 5 or 5.5 indicated watts with my overnight charged battery taste just like the ones at the end of two days when I go to bed and put it on charge. Maybe if all the "low volt/watt" vapers get scared & don't buy, the price may go down.
Edit- And if that makes sense to you SG, feel free to quote me over there