So...after a few days of testing i found out that i only need 13.2 second for a single page if i use a direct network scan where my pc is in the adressbook. Fine, so the scaner is faster than the normal 50 seconds per page i need via paperport. The problem with this method is that i can only scan single pages ... and i have no intention to scan 32 pages by hand.
Somewhere must be a big problem. Its kinda suspicious that im the first one with this one.