My original post mentioned that Apple spent a lot of time thinking about the user experience of the iPad before they actually produced it. Samsung hasn't put nearly as much thought into the user experience. The point being that it's natural that the Galaxy Tab has a higher rate of return than the iPad.

It should be the case that iPad is the market leader in this category. They created the category and made a very nice device. The other tablets are not nearly as polished as the iPad and this is obvious once you use them.

Concluding from what I've written that I think that "every decision Apple made with the iPad (in particular form factor) has been validated" is a miscarachterization.