The wikipedia article has a bit more detail for those interested: http://en.wikipedia.org/wiki/Electromagnetic_hypersensitivit...
This is the sort of thing that should have been mentioned in the article. Either through shoddy research or intentional omission the author included none of this and left it with two short paragraphs of dissent. The article gives the impression little work has been done on this issue.
Another example of shoddy science reporting in the media. sigh
[1] http://en.wikipedia.org/wiki/Electromagnetic_hypersensitivit...