I noticed that the new agent check in was delayed by some time after machines were added to the domain/ network.  I reviewed our Domain watch probe settings and our Incremental Sync Interval was set to 60 minutes for the domain probe.  I am going to bring this down as we don't want to delay new machines from being identified and push out the respective procedures etc.  

My question is, what has been a moderate time that others have used for this sync?  I am assuming that it is only collecting any new changes and we still perform a weekly Full sync on Fridays after hours.

I was thinking 5 minutes would be a good starting point