I found this from a 2002 article:http://runningtimes.com/Print.aspx?articleID=5232
Looking Down the Long Run
Lydiard training is not a quick fix. It’s a gradual progressive improvement. "What you do this year is really for the next year," he advises. "It’s not what you do this year or next year but what you do in five to 10 years time that counts."
Likewise, he warns a group of sensational U.S. high school runners who recently moved on to college: "It has been 27 years since John Walker graduated from high school. Since then, there have been 27 high school mile champions in New Zealand. Where are they now? We’ve had 27 young boys who had just as much potential as John Walker. The problem is, we destroy their potential. That young lad of yours who broke Jim Ryun’s high school mile record [Alan Webb] obviously has a lot of talent. But the important thing is, what will he be doing 10 years from now."