Java Development Tools

Hi,

I am now working for a wihile with ADF. I started with an Web Application in ADF based on Web Services and now I am working also with ADF BC. Befor this I have build web apps using Spring MVC and Hibernate. Until now I am very impressed by ADF. It is realy possible to build good looking appliactions in a short time. Sometimes the ADF framework looks a little massive and heavy and slow. For example the feature demo seems not to be a verry fast application. Of course this may be due to the hardware.
I can understand that ADF is used by Oracle for their business application because in my opinion there are always a limited group of users.
What I was wondering is ADF suitable for High performance/High transactional/High scalability web applications? for example web applications for online banking with a lot of concurrent users.
I have tried to find examples of such applications but I could not find them easiliy.

Can some give some examples of such appliactions that are build with ADF?

Joost