Would be interesting to see if...
... the ones claiming to be sensitive have not only been tested with Wi-Fi and mobile phones but also DECT landline phones as they run on the 2.4 frequency as well, but I'd be pretty sure that they wouldn't complain about them as the technology doesn't fit the same category. I'm not dismissing the fact that some people could be more sensitive than others (my wife suffers from ME, basically meaning her spleen and maybe a couple of other organs are slightly deficient).
Also do the sensitive suffers suffer on a daily basis from all of the natural radiation currently being emitted by the planet, (this radiation being the sort that helps young humanoids develop a thicker skull into adult life).
Still too many questions and not enough highlight on radiation that is actually beneficial on a daily basis to human development.