We recently had a new Workcenter 7855 installed to replace an older Xerox model. I am just a user with no access to any configuration menus, so it may have been mis-configured, however the designer of the on-screen keyboard should be reprimanded for creating a keyboard where now the shifted keyboard is different from 99% of real keyboards out there. e.g. <shift 1> should be "!", <shift 2> should be "@", etc. I expect better from a company with the UI history of Xerox.
On the positive side, it does not appear to lag like the previous model.