bears5122 - 5:40 pm on Feb 16, 2011 (gmt 0)
If you look at the links going to the sub-category pages, it's painfully obvious to see where they get their links from. We are all capable of deciphering how one acquires such links.
This shouldn't be a surprise though. Most of these large online retailers have hired SEOs over the years and they are doing many of the same things we all are (albeit on much larger budgets). Difference being that Google doesn't seem to care about them doing it unless the NYT writes a piece on it.