I found it not difficult but increasingly repetitive. After a while one gets the gist and it seemed as though he had pages to fill more than anything new to fill them with. Bit like Stephen King novelsDex, the God Delusion wasn't that hard to read..was quite enjoyable..he did dumb a few things down a little, but that is his job I guess.
Did it get any better towards the end?
I think he was writing it knowing that it was going out in america too...positive reinforcement I think they call it.