Accessing Explorer-based places/views (like Desktop, PDA, Network,...) are very slow since DO 9 (up to latest 9.1.0.1).
I found out that this doesn't happen on a fresh install. After importing my settings, the delay is back again (also when going back to a "normal" folder before; there's always a ~1-2 sec. delay until e.g. desktop is shown).
So a few weeks ago I reconfigured my hole settings in a two-hour procedure , based on a fresh install and everything was fine. Now this behaviour is back again. I believe it has to do with reimporting settings and/or updating DO.
BTW this appears on different PC's with different settings, always reproducable the same way. Moving within "normal" folders is fast and without any delay. In Explorer there's also no delay.