Well, ok, not quite.
But according to a Harvard study, there is a strong correlation between consumption of potatoes to weight gain.
From the WSJ:
"Eating more potato chips and French fries is likely to lead to a bigger weight gain over the years than the weight change associated with eating more of other foods, new research indicates.
The study, from the New England Journal of Medicine, stands out because it quantifies how much weight a person is likely to gain or lose over four years based on one additional daily serving of a range of specific foods. Eating more potatoes correlated with a gain of 1.28 pounds, with French fries in particular associated with a 3.35-pound gain."
Full article here: http://goo.gl/BmLHB