...
When you start to develop in GWT as a traditional web application developper you have to think differently.
In a 3 tier application architecture, the server is playing a central role from Data Access, Business logic and Presentation. In fact, most of the work is done by the server. The approach could be called "server-centric".
On the contrary, GWT is a "client-centric" tool. Usually, all the presentation layer resides on the client side. This is what we've done.
Furthermore, in a traditional web application, the Backing Beans are available when you define a new JSP view.
...