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“The Barnett remains important as the only shale play that has been developed to maturity. We believe that the Barnett largely dispels the belief that modern shale production is a „manufacturing process,‟ or that shales constitute „gas factories.‟ That belief is premised on the idea that shales have large cores that are uniform, that each well is similar, and that over time wells get better. Our data from the Barnett shows that all three of these premises are wrong. The core areas are small, wells vary considerably even in close proximity, and over times wells have gotten worse, not better.”