The 2 big glaring problems I see with the study off the bat: it was 'self reported' and it didn't isolate the factor in question. These sorts of studies are pretty useless in proving cause. The problem with all these studies is that you don't know what other variables are involved here. Certainly no scientist would make a statement as if it were fact like this article does ... what would be honest to say is 'suggests a link' and that 'more research needs to be done'. But that doesn't make for a sensational headline now does it?
I think everyone should read "good calories, bad calories". It helps you quickly identify the studies that are, to put it in scientific terms, total BS.
Molecular Grokologist, jump in here please!