[jacquesm]

You have my interest peaked though regarding the magnitude, and I really support your idea for an experiment.

Writing style apparently is not as easy to distinguish as we thought it was:

http://news.ycombinator.com/item?id=1199592

and a follow-up:

http://news.ycombinator.com/item?id=1203836

So the previously mentioned 'but we'll recognize people by their writing style if we obscure their ids' probably does not hold water.