I disagree, it means the same to me whether it is a physical copy or not. I'll train as hard and follow his principles the same. I'd just rather an eBook for a number of reasons: more comfortable to read -for me at least-, typically cheaper (since it doesn't have a printing cost) and I'd get it faster (since I live in Europe, it'll probably take much longer for me to be able to read it than someone in Ohio).
I mean, a whole lot of people -like myself- from outside the US would gladly pay full price for the Kindle version just to have it as soon as the book is out instead of having to wait weeks for the ships/planes to bring it here. Jim would also get more $, since Amazon doesn't get that big of a cut.
All that said, I respect Jim's decision because it is his damn book and he can do whatever the hell he wants, though.
PS: If the reason to not have an eBook is to avoid piracy, that's a lost battle; I guarantee that someone is going to scan every single fucking page of the book and put it out there pretty soon after it is out.