Lenski agrees that the beneficial mutations seen in his Long Term Evolution Experiment are overwhelmingly degradative or loss-of-function ones.
Perhaps the evidence for the vast scope of Darwin’s theory really isn’t as strong as biologists over the years have been telling each other.
Lang and Rice cite a number of articles to show that loss-of-function mutations are just a small minority of those found in studies of organisms.
Their review pretty much completely misses the mark. Nonetheless, it is a good illustration of how sincere-yet-perplexed professional evolutionary biologists view the data.
Coyne is sure this is going to come as a rude shock, to our colleague and contributor Dr. Behe in particular, “a slap in the face of IDers like Michael Behe — a fish slap like the one below.”