Arcmain Estimates - response (2) by seven11

as always the usual answer "it depends", some other factors in play
 
Data/objects make up, multi-stream backups work best with large objects if there are a proportinally more tiny objects in a backup set there will be an adverse affect since there is a constant build-up tear-down process for each object this is where using a single-stream backup for things like views & macro databases may perform better but from a backup set intergrity point of view most people would be grouping their data based on mainly on application/business requirements.
 
Ultimatley the biggest variant would be if you are running the backup/restore against a quiesent system or not, as backup and restore are I/O intensive operations if they have to contend with other processes for a finite resource.
 
 
ta'