My young niece, whom I mentioned in the previous post, also read them in the new order. She seems to think this order is fine. When discussing this reading order with people my own age, however, I've been told by one person my own age (so far) that the new order is stupid.
I still think that the quality of the stories does not hinge on the order in which they are read. They are very simple stories. The plots are not difficult to follow. You could probably read them in any order at all and follow along just fine.
There is only one reason I can see, so far, for putting them back in the old order: The Magician's Nephew was not exciting, and The Lion, the Witch and the Wardrobe is. So I guess for children who bore easily, the original order may be better.
But then, I was one of those children that bore easily, and I started with The Lion, the Witch and the Wardrobe when I was a child, and then went no further. So most likely, it doesn't matter.