Let's all remember how this thread started, and Mike got stuck spending an awful lot of his own time and money on this.
There was an e cig meeting. At that forum, the work by Wang regarding thermal breakdown products was referenced. Then there was a presentation by Evolv using all sorts of data from ecig stats claiming vapers may vape too hot and TC was the answer. Some of us were less than satisfied with the actual data presented.
The big question was, is it reasonable to assume the temperature you set on a mod is the temperature the coil actually works at as there are lots of variables involved? Without actual data (Evolv never actually measured the coil temp separate from monitoring the resistance, in other words, treating the coil as both heat source and thermocouple) there was a theoretical debate about coil temperatures that ranged from meteorological information to quantum physics. After 50 pages making no real progress Mike stepped up to the plate and figured out a way of measuring the temp directly with small thermocouples.
Mike has been able to answer important questions, including yes, the temps set for a particular TC board (only tested a DNA board, no info on lots of others out there) were accurate to +/- 10F. Mike then extended it to look at other wattage settings and different coil types. This was all really useful info. He even extended it to the effects of different airflows, from low to high and confirmed high airflow lowered coil temps which might seem intuitive, but nice to real data confirm it.
Al of this work fails to complete the final piece of an answer for us vapers. We know how stuff breaks down in a reactor (Wang). We know temps when vaping can get higher than expected without TC (Mike, and inferences by Evolv). Now what needs to be done is measuring thermal breakdown products generated by actual coils in actual tank under actual conditions a vaper would use at different temperatures. From the start, Mike stated he could not perform that analysis, but did produce the temp data to provide that foundation of whether or not we really were vaporizing e liquid at temperatures achieved in a thermal reactor.
So Mike provided the community with valuable information and guidance that until the final step is done, breakdown products at different temp setting from real life setups, it is reasonable for a vaper to choose to keep their temperatures a bit lower than they might have expected (especially in wattage/power users). There is also enough data provide by Mike to suggest that a vaper might well not change their vape pattern, as without a test of both breakdown products at measured temperatures from actual coils simultaneously, the risk remains theoretical and it's up to the vaper how to proceed.
This testing should have properly been done by someone like Evolv with the resources and capital to test their own equipment, rather than trying to infer temperatures from e cig stat data. But they didn't so Mike did it for us. We owe a debt of gratitude to Mike for all the time, money, and effort placed into this.