>Or come up with a different interface that doesn't have 18 pages, or use delayed instantiation on the objects after the 1st page.

We're already doing delayed instantiation - that isn't the cause of the slowdown. And as far as an interface with fewer than 18 pages, although I won't say it isn't possible, it would be a serious re-write of two of the most often used forms in our system. Also, I don't think it would be easy to decide which data that is directly related to what the user is working with should no longer be accessible from the main form. And if we did pull several pages worth of controls, and put them on another form, our users would expect to be able to have both forms up at the same time.