Do not attempt to contact the central User grid service for an ID if the agent is known to the current region. (!) Avoids a network call, and makes lookups of local users very consistently only the 100ms delay.
Any avatar known to the current region (not just those in the current region) gets the shorter delay on lookup. (i.e. The short delay now applies to lookups of avatars in neighbor regions.)
Changed the long delay to be 1 second (applied in addition to the User grid service network/lookup time), was 5 seconds. (That still slows the impact on User when called in a loop by well over 90%.)