The key point that I was trying to make is that IB is fundamentally separate from the code that is running in the application. In traditional RAD tools like VB, Delphi and Powerbuilder the interface and application logic are one and the same, you literally have code behind each form and each UI element.

I didn't say anything about IB generating code.

Apologies - I read "in that the code doesn't live directly behind the GUI elements" as an inference that it lived somewhere else. I just wanted to add a clarification in case others read it the same way.