Big ups on your use of GGplot--best R graphing capabilities around!
In response to your update about the QQ Plot, I didn't compare against normality like you did (the article is comparing exponentials, so a normal QQ isn't the best choice). The QQ Plot just compars the quantiles of one distribution to another (could be an ecdf against a hypothesized cdf, or an ecdf against another ecdf...). Essentially, by plotting one set of points against another, I'm suggesting that the empirical distribution of Annie is the same as the empirical distribution of Brian, or any other pairing.
Good point; I wasn't using the data from the link but what you mention (doing a QQ plot of distribution pairs to check if they are similar) is probably what I should've posted instead of a QQ plot of some other dataset against an ideal normal distribution.
