ICS users now have a few extra types of "peer groups" which can be used to compare ICS performance.
These are all available immediately on the "Peers" page, and allow the set up of up to four peer comparison lines for all detailed metric charts.

The new groups include "all ICS" which does what you'd expect, "My Regional ICS", which is all ICS in the same region as the user's reference ICS, and a set of regionally averaged ICS performance. The original "Not Set" (no line is shown), and "Custom" (pick an arbitrary single ICS or set of ICSes to compare against) are still there.