Humm... Great debate!
At the opening of our webdesign website (1995), we were giving all sources files. We change our policy to not giving the PSD now for thoses reasons:
1. Our price are really cheap (15$/banner) for high-end design.
2. Clients ask always for "Who To" in our sources files, anyways.
3. Clients, we modified the original work, are no use for us in our portfolio.
4. Clients destroy our design and tell others clients that is our work.
5. Our design are our image. If they change it, they show a wrong image and quality of what we can do.
Keep in mind that we're have Europe clients, not US clients (or too many). Europe clients think that they could hire High-end designers for 10$/banners... In average time on each banner project, we pass 2hours. 7-8hours for a single page... Imagine the time for a full paysite of 4-5 pages! The main reason is they, in general, don't know what they want but know what they didn't want...
In general, US clients are better clients, they know the time a project takes to be perfect and have more respect for the designers works...
Hope this could help,
