That's true. But to get the same resistance (1.2Ω) of a single coil in a dual coil atty, you'll need to use two 2.4Ω coils in parallel. So the wires need to be thicker, if anything.
I'm also surprised that there is so little information about that coil on Innokin website and/or the vendors' websites. I can't find any reviews anywhere.
Anyway, I still use Eleaf GS dual coil atties and love them because they produce more vapor at lower wattages than the singles and I like that. But I need at least 6 or 7 watts per coil to get a decent vape. Other GS users prefer singles because they heat up faster.
And for those who don't remember, dual coils were first introduced to help with the constantly burning fillers in cartomizers (thin hot wires wrapped in poly-something fillers was a really bad idea).
Well, that didn't help much.
The only thing that worked were carto tanks, which kept the filler constantly saturated in eliquid. 
Oh, the good old days.
We've come a long way.
