That is still pretty much how I see it too. I could imagine the spiral if it was a reaaaaaaaaly long spiral so that for any siginficant portion of the Whirl, it seemed much like the lampshade paradigm that seems supported very often by the text (these thin strips of sun appearing, etc.)<br>
<br>I don't think there can be any doubt, from the evidence, that the shade rotates (or the Whorl rotates round it!!!) north south. But if the East/West spiral was long enough, you might get the lampshade effect but still have some distant 'time zone' effect.<br>