The Iraqis have a valid gripe here. This information is simply wrong and there is no two ways about it. He married his wife Aisha when she was six and he waited until she was nine to have sex with her. That's what the Koran says. The author needs to get his facts straight.
What evidence is there that the true Muhammad ever lived at all; with nothing but the written record to analyze, the “man” could be just another myth.