Add the following registry key to the SCCM Distribution Point and restart the WDS service:
TYPE: REG_DWORD Value: 16384
For us this made a massive difference from over 5 mins to under 15 seconds!
If you’re looking for network monitoring software for your infrastructure have a look at Cacti. Best of all its Free! I use it to notify me if a switch goes down or if the utilisation exceeds a threshold. It also provides me with daily backups of my router and switch configs. However my favourite feature is the live weather map that’s extremely useful to glance at.