Agree, that advice seems to be targeting folks who have had a 401K since they were 22. Also, I think it is basically saying the point where you start adjusting

Agree, that advice seems to be targeting folks who have had a 401K since they were 22. Also, I think it is basically saying the point where you start adjusting your stock/bond ratio down. At 40, maybe you have 80% in stocks, and change it to 75% when you turn 45.