P.Z.Myers criticized this rather severely[0] a couple days back. "They cherrypicked their data points. They didn’t include lungfish, ferns, onions, or some protists because that would totally undermine their premise; those are contemporary organisms with much larger genomes than mammals’, and their shallow, stupid exercise in curve-fitting would have flopped miserably. It’s a great example of garbage in, garbage out."

[0]http://freethoughtblogs.com/pharyngula/2013/04/18/graaarh-ph...