I think the problem is not only the data bound to the controls but also th amount of controls on all the pages... So here is my idea to solve the loading time problem After creatung the pageframe yo save the controls of every page as a container Class (Save as class) nad then you delete them from the pageframe. Wihtout the contents if will show up verry fast. During runtime you load the containers for each page when the page is activated....
Its just an other way to solve the loading time problem

Greetings
Stefan