I think it better that the ecig industry do studies. Those who fund the studies control the data and get to be the interpreters.
If you are talking about chemical content of the liquid, many vendors do conduct regular testing of their products and post test results on their web sites. Except for the FDA's "study", all of the studies that were reviewed in the Cahn & Siegel analysis were funded by e-cigarette companies.
If you are talking about the "dose" of nicotine users get, that's a non-issue. Smokers don't know how much nicotine is in their brand of tobacco cigarettes either. Furthermore, smokers tend to self-regulate their nicotine, so they might be getting different amounts of nicotine from the same brand during different smoking sessions.
It would be nice to have the percent of nicotine accurately measured and documented on the product label.
If we are talking about clinical trials to prove e-cigs help people quit, that's nice, but not a necessity. We know that snus is effective as a substitute for smoking because we have population studies that show many of the snus users are former smokers. Likewise, we have survey data that shows us that at least SOME consumers are using them to quit.
It is certainly not a necessity to prove e-cigs help smokers quit if e-cigs are to be regulated as a tobacco product.
It's obvious that even though it is the Tobacco Program director talking, he has his head wrapped around the idea that e-cigarettes are a medical treatment.
I would have been MUCH more impressed if Deyton had talked about reasonable regulations (batch testing, labeling, packaging) that FDA would be considering when they regulate e-cigs as tobacco products. Instead, I get a very strong feeling that if the FDA does regulate e-cigs, it will be with the end-goal of getting most products removed from the market, leaving only the least effective ones available.
When I say "effective" I mean "acceptable as a substitute for smoking," not as a cure for nicotine addiction.