Yeah, you get an eye for the steam after a while; It's lighter in color, and moves and swirls more easily with a slight breeze. Disappears quickly if the humidity outside isn't too high. What I'm seeing (and smelling) is creo smoke, I'm pretty sure.
That's pretty close to what I see, I usually go from 600 to 1200 in as fast as 5 minutes with an air setting at 1.5. This mornings reload I hit 1500 at a setting of 1, then I shut her down to .5 and she came down to 1100.