There’s a lot of weirdness and inconsistencies going on in some Apple apps and interfaces, but the Home screen is the prime example of a user interface meant for 2007 which was subsequently patched and refined and patched again to accomodate new functionalities introduced in iOS.
His conclusion is spot on:
Apple needs to tear apart the whole concept and rebuild it from the ground up.
I know that after using Android 4.0 for a while, my iPhone’s home screen felt so very cramped and dated. The Home screen doesn’t just need to be a springboard to get to apps, in some ways it needs to be an app in and of itself.