Sabermetrics and Clemens

This article on NY Times by a group of people from Wharton uses Sabermetrics (the statistical analysis of baseball data) to arrive at the following conclusion:

Our reading is that the available data on Clemens’s career strongly hint that some unusual factors may have been at play in producing his excellent late-career statistics.

Such conclusions may make good coffee room discussion topics, but are no substitutes for hard evidence and human testimonies in Roger Clemens' steroid abuse case.