Doesn't matter. General handwaving in the direction of textbooks in general is more than enough to substantiate his assertion. For the credulous and the already convinced, anyway. That's the grist to the creationist rumour mill.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'