I am sceptical about this claim to say the least, but it is a proposition that can be tested if, in five years time, medically regulated e-cigarettes have dominated the market at the expense of un-(medically)-regulated products.
The only way to carry out this test is to do what I see as the obvious solution: make companies go
through medical regulation if they want to make medicinal claims (eg. "this is a proven smoking-cessation aid") and leave companies alone if they want to market their products as recreational
devices.