That looks like an excerpt from the GUP best practices document.
I think the idea behind what you posted is for you to create a group, place only one machine in it and then set that group to pull with a heartbeat of every two minutes. This will force the SEPM to create deltas on a more regular basis so that they are already available when a large group comes looking for numerous different deltas.
I.e.
Group 1 = 2 minute heartbeat = three deltas spread out over an hour’s time
Group 2 = 60 minute heartbeat = three deltas needed right now
At least that is my interpretation of the excerpt that you posted.
http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2008081810593048 This is the link to the complete write up.