Republicans and the religious right will say that this proves that they're in the majority, except that contrary to the drumbeat of the MSM not everyone who believes in God (or something like it) is a Republican voter. In fact, the very broad category of people who believe in God constitutes a majority in both parties. Let's just say that I, Oliver Willis, would probably be on the majority side of this survey but it isn't likely that I'm voting Republican in this life or the next.
Then the evolution denialists will say that the popularity of creationism means that there is a controversy to be taught. But like I said here it doesn't matter how many surveys one takes - even if 100% of people believed the earth was only 6,000 years old - that assertion is not supported by the evidence that counts. Its not a valid claim.