I don't think you'd see such a correlation yet. As soon as these 'scientists' sound the 'low carb' == 'evolutionism' alarm, you may see a swift realignment from the creationist populace.
I'm not so sure that would happen. Keep in mind evolutionary psychology is extremely controversial even among scientists who are atheists.
Based on the community's continuing interests in diet and religion, I'd like to point out this blog post by the coauthor of Protein Power, Michael Eades, wherein he suggests that biblical literalism tends toward a low-fat approach to nutrition over a low-carb philosophy, by essentially throwing out a bunch of evidence on the matter:
While there's a clear persuasive agenda here and I won't present a full analysis of the situation, Eades also mentions biasing use of language earlier in the article. In particular, beware applause lights and confirmation bias in evaluating.