Barry Setterfield's theory is nonsense. There is a lot of interest on the part of physicists in varying speed of light (VSL) theories. These are not based on evidence that the speed of light is different--contrary to Setterfield there is no such evidence. Rather, they are interested in the implications of these theories and the possibility that a VSL model might replace the inflationary model of the early universe. All agree that if the speed of light used to be higher it was billions of years ago, decayed rapidly, and was not as exponentially high as Setterfield proposes. Setterfield's theory has multiple flaws, including the fact that his model would result in frying every living creature with rapid radioactive decay in the earth's crust. The papers in this field are mind-bogglingly complicated, but from my reading Setterfield has not done the calculations required to determine how changing this constant affects other parameters and to confirm his model doesn't have any of the bizarre and catastrophic side-effects of VSL cosmologies.
I see you're spreading the same old misrepresentations about Setterfield's work that have been around since the beginning.
Go here to see all of these objections answered. Nothing gets 'fried' except some misconceptions about cdk.
http://host380.ipowerweb.com/~setterfi/discussionindex.htm