Men Get Their Coffee Faster?

I was flipping through the morning e-papers and found an article from last weekend in Slate about a study performed in Boston about how women wait an average of 20 seconds longer to be served then did men.

I'm guessing the large majority of the eight coffee establishments polled were chains such as Starbucks and such, but I wonder if the same holds true for local places? Realistically, it could very well be a Boston thing or some other factor, but I can't see how or why any barista would have such a dichotomy in service between genders (unless there's a subconscious mechanism at work?).