How can you more readily find something in a smaller space? And the new start menu is much easier to organize then the old start menu.
Is this a serious question?
Also I think the "start menu" argument encompass in reality the whole concept of Metro against traditional desktop UI.
I'm really hoping that this all makes sense once you start using it, as I'm going to have to make a decision on what to upgrade my parents' computer to (Win 7 or Win 8) -- I don't want to confuse them.
Edit: I agree it looks crazy, but at least it behaves consistently!