I know that this normally takes longer, but not that long...
This can depend on lot of things:
-HW config on server
-HW config client
-Network
-Ovarall size of metadata
-Structure of metadata (how many jobs/tables deep goes your impact)
-Configuration of the metadata server (reorg, drop deleted objects, server settings...)
-The load on the server (overall and metadata server)
The easiest to check out is the client, start the Task Manager and see how your CPU and RAM handles your impact analysis.
/Linus
Data never sleeps