I would argue that even though some of the controls and dialogs don't feel OS X like doesn't matter for the target Photoshop market. The people that use Photoshop day in and out are accustomed to the interface and don't really want it to change. Photoshop isn't a tool like, the web browser, a word processor, or etc, when your using Photoshop your focusing on the task at hand. In fact, Final Cut Pro has a very unique, non-OS X look to it, and it doesn't matter that much because it's a pro tool that when your using it, your totally engulfed in the app. However, with regards to crufty internals, I have to agree, it's time very some refactoring.