Ibn Warraq is a moron apostate. He's atheist, and rejects God altogether. I've got a link on my site to Islamic-Awareness that proves the origin of the Qur'an. Islamic-awareness provides proofs and even pictures. Check it out yourself: http://www.islamic-awareness.org/Quran/Text/Mss/
By the way, you didn't even read that paper you linked. You got the link from the other message baord you frequent, and considering it was just posted there about 20 mins ago, either you are a record speed reader, or you didn't read it.