When it works correctly hit times in WC are around 0.2 - 0.4 seconds and Web Monitor reports about 0.4 to 0.8 second results. But when there is a problem with w3wp.exe (shown by watching in task manager processes), the hit times in WC are the same but Web Monitor shows 15-20 second results.
No known recent changes to anything on the server other than MS monthly Updates. System has been stable for several years.
Any thoughts?