Clocks and pies

Keith A submitted this graphical idea from the folks at Ikea (via Boing Boing).  

Based on the comments, it seems like some people really like this presentation!

Consider these for amusement:

• Does the "9" on Sunday mean 9 am or 9 pm?  (This chart mixes A.M. and P.M. hours in a totally nonchalant way.)
• If the above is too easy, try the "9" for Saturday!
• Why was "9" displayed on Sunday anyway?  Meanwhile, why wasn't "7" displayed for Saturday?  (How were the hour labels chosen?)
• Why was "Closed" written on the chart while "High", "Mid", and "Low" were put into the legend?
• Since pie charts show proportions, is it possible to describe what proportions were plotted?

Reminds me of this pie chart.