Define "poor". Because fundamentally, the numbers were incredible especially before a production wind down before fourth gen iPad. Only to made up perverse voices in ones head (analysts) can that be considered an upset.
Android Tablet market share hit 25% and Apples share is down to 56%. Didnt this happen to iPhone in the same way?
Microsoft has just launched Surface and im betting 2nd generation hardware will be a serious problem for Apple. Especially when Windows 8 Apps increase.
Share prices are forward looking and it seems that Apple is peaking and the competitors becoming better. Samsung already is the top smartphone manufacturer. Tablets are catching up.
Apples new iPad mini is just an expensive "me too" and shares dropped on the disappointment of that too.
Retina Macbook 13" offers zero value for its price and doesnt even have a GPU and overpriced SSD's and no way to upgrade.
So things are really looking up for Apple! hence the $100 drop in share price in 1 week.