"similar" Needs better definition. The earliness depended on stock and I would need to look. But, since the don't have (to my knowledge) a site in the watershed where they trap 100% of the steelhead that return, where they age 100% of the steelhead that return I don't believe they can say diddle e squat about timing. This difference in age vs return timing has been known since Waddell Creek in CA.