Just had a discussion about french fries. I am of the following opinion, which I have long held:

Fries are nothing more than edible utensils for condiments. As such, surface area is the most important aspect. Steak fries have a lower surface area to volume ratio, and therefore are not as useful. There is less for the condiments to stick to.

And condiments are defined as salt, ketchup and grease (preferably of the oft-banned trans fat variety). I'll accept Malt Vinegar from the Brits though.