Antony Flew was persuaded by bad ID arguments. In particular, he was swayed by fallacious statistical arguments regarding abiogenesis which he falsely stated have not been addressed by Dawkins and others. He admits, however, that he hasn’t actually kept up with or read any of the science. He basically doesn’t know what he’s talking about. He’s a philosopher, not a scientist.
He is also a pretty obscure figure who most atheists, including me, had never even heard of before religionists started trumpeting his rather unremarkable conversion. Atheism is not an ideology. It has no leaders. The fact that some obscure philosopher was dumb enough to fall for a creationist argument is not making anybody else fall to their knees. From what I’ve read of his statements, Flew is just a dipshit that’s too easily impressed by ID bullshit. He mneeds to take a science class.
As to the OP, I haven’t read it cover to cover, but I skimmed a lot of it at the bookstore not too long ago and got a pretty good sense of it. It’s not as bad as some of the other stupid, whiny, anti-Dawkins books that are out there but it doesn’t offer much to support the existence of God either. It largely addresses some of dawkins’ more sweeping claims about religion being toxic in general, claims that he focuses too much on fundie beliefs and generalizes them to all Christians, that he takes the Bible too literally – or rather, that he assumes all Christians do – that Christians are necessarily irrational and stupid, etc. These points are all pretty fair, Dawkins does get too polemic at times, too categorical, too sweeping, unecessarily belittling. That’s all true. The fact that he is abrasive and belittling, however, is not, in itself, a proof that God exists.
While a lot of time is spent attacking Dawkins’ style and his conclusions about religious people in general, I didn’t see much in the way of counters to his arguments against the existence of God. There was ad populem argumentation and some fallacious special pleading about the necessity of religion for morality. Maybe there was someything really dynamite that I missed in my reading, but I dount it.
All in all, it didn’t strike me as literalist, fundie hogwash like Strobel or McDowell, more like "We’re not all Noah’s Ark believing knuckle dragging morons kind of stuff. Don’t expect anything really substantial in the EoG debate, though.