I agree. In my past experience I have found it actually better to build all the domain elements (model) first based on command line usage, as it more clearly and accurately defines the problem (focus is not lost on GUI issues), and then work on GUI development.
This allows very loosely coupled yet highly cohesive systems to be easily built. The main problem I face with others who adopt a GUI-driven development method (which has many merits of course) is they start to confuse elements/logic/tiers and tie things together too much at too early a stage and hence is is no separation of concerns and elements making systems harder to change/scale/iterate-upon etc.
This allows very loosely coupled yet highly cohesive systems to be easily built. The main problem I face with others who adopt a GUI-driven development method (which has many merits of course) is they start to confuse elements/logic/tiers and tie things together too much at too early a stage and hence is is no separation of concerns and elements making systems harder to change/scale/iterate-upon etc.