DEMdev​  Thanks for the reply.   Sorry it took awhile to respond.

So I get what your saying about the DEM.   Yes...I am persisting maybe a bit too much and GP logon times are yielding that.   However, my real problem is with Shell Load times and I have no idea why.   The following is what I observed this morning (this is not the 4 minute logon capture  as I don't have the new image with logging monitor set to all pools yet).

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] Logon Time: 149.36 seconds

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] Logon Start To Hive Loaded Time: 3.88 seconds

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] Logon Start To Classes Hive Loaded Time: 4.63 seconds

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] Profile Sync Time: 0.00 seconds

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] Windows Folder Redirection Apply Time: 0.00 seconds

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] Shell Load Time: 103.49 seconds

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] Total Logon Script Time: 0.00 seconds

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] User Policy Apply Time: 39 seconds

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] Machine Policy Apply Time: 0 seconds

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] Group Policy Software Install Time: 0.59 seconds

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] Free Disk Space Available To User: 17 GB

2020-01-16T07:43:28.414 INFO (0cc8-15d8) [LogonMonitor::LogSummary] ******************************************************************************************

It does not happen to everyone.  It is not pool specific.   They all use the same snapshot of the master.