This is very interesting. Craig L. Blomberg is an American New Testament scholar at the evangelical Denver Seminary in Colorado and he is explicitly motivated in his work as a conservative Evangelical to defend the inerrancy of the Bible (if he did not affirm the inerrancy of the Bible he could not keep his job). As such his work is not as objective historically as it could be. BUT see his disarmingly honest comments about the comparative textual reliability of the Qur’an when compared with the New Testament. Blomberg refers to:
“a growing and sophisticated Muslim apologetics that builds its case from the fact the New Testament was not preserved as accurately as the Qur’an has been”
Dr Craig Blomberg talks about his book The Historical Reliability of the New Testament. The quote begins at -2:48.