Gary Varga (2/10/2014)
Another key issue is "perceived performance". I have worked on a number of systems when the performance has been drastically improved over the original system, however, the users disagree. This has at times lead to management support for the users belief that the performance is worse.
+1000 on that. Been burned by the very perception before. Just the mere mention of any change can get the users watching for slowness and because they're concentrating on that, it actually does seem slower to them. That's why part of my baselining for such things include a trip out to user-ville with a stopwatch and a list of screens to be tested.
--Jeff Moden
Change is inevitable... Change for the better is not.