I wouldn't go as far to say worthless. Most people who have had their car chipped said they noticed a seat of your pants improvement, myself included... for whatever that's worth. I will agree that the gain may not be what they claim and it is BS they have not done a dyno.

Without doing a search, I believe a former member, Wes Michaels was the first to have his car chipped. If memory serves me correctly, he posted some before and after runs which showed some improvement.