Your reply suggests that you haven't grasped the underlying point being made.

Most (all?) people today spend at least a couple of hours everyday surfing the web on all sorts of devices. Hence they have seen all sorts of Web UI (good/bad/ugly) and thus know how to navigate them to get to what they want.

Hence to harp on website navigation is foolish. Particularly when the site is actually pretty good design focusing on information and not UI fluff.