I am going by memory here. I will be sure to watch the replay when it is available, and find the paper if it is available when I have time. As I recall, these were in general >1 year vapers, so they had all gotten past the hump. Very experienced vapers, mostly using APVs, tanks, etc. But it was a mean nic level, and I'm sure there were some at higher than when they were smoking, and some lower. But as a whole, we tend to gravitate to where we were before switching.
The conclusions I draw are this: don't over-analyze the level you are at. If it is too high for you with the grear you are using at the moment, your body will tell you. If it is too low, same thing. If you are vaping more or less without a lot of thought, that is. Absent mindedly puffing as you are focused on something else. People smoke at the same PAD for decades. Its not easy to abuse nicotine, the body self regulates it. But if you are consciously wanting to cut down on the nic, it appears to be easier (less dependence) than smoking. This is because it seems to be harder to get that initial rapid spike in blood levels like the first smoke in the morning. Nic levels rise slower, and also taper off slower, so with vaping you tend to have more of a constant nic level in the blood, rather than the roller coaster of having a smoke every hour or so. Foulds said on average vaping gives more of a nic patch effect than a cigarette effect. I think oral tobacco is more like that too, like snus.
But while this is really fascinating to me, much more on topic for this thread: I also like VT TH more than VT regular. I get virtually no taste from it at all, just more TH and a bit of tickle in the nose. But on a scale of 0 - 10 for pepper, if VT regular is a 0, and MFS vintage 2010 is a 10 on the pepper scale (harshest nic I know of), I put VT TH around a 3. It lets you know its there, but it doesn't crash the party.