Android doesn't really get it right either. Sometimes I get a notification for two new text messages with google voice. I tap the notification which opens up the google voice app and lets me read the first message.

How do I read my 2nd new message? In my mind, I should hit "back" to take me up a level to the list of text messages, and then tap on the other new message to read it. What actually happens when you hit "back" is the app closes and goes back to whatever I was doing previously. Then I have to go to my home screen, and open up the google voice app from there in order to get to my messages list so that I can click on the other new message.

It's very confusing. It's also inconsistent. Some apps will insert screens into the window stack so that back will take you up a level in the application. Others won't, and I accidentally back out of the app entirely. Annoying.

I don't find his design writing to be terribly insightful.