since you've sort of responded to my points, i'll probably settle on one last shot at this beaten horse...
1) barton was closer to 4-flat than you seem to want to admit, so therefore only around 5 seconds slower than me. maybe even closer if he was able to compete post-collegiately like i was (i only ran the equivalent of a 4-flat in college), but there are too many factors to name that limit those opportunities, especially in the 90s. or maybe he just underachieved in his youth--i've heard many a master admit as much...
2) i've seen that age lightning bolt hit at various ages from 30-55. there are so many factors you seem so willing to overlook--life, family, children, motivation, time, jobs, geography, genetics, teammates, coaching, diet, money, healthcare, etc.--that may determine failure, mediocrity, and sucess, yet you would rather settle on drugs. that's your right, and you may even be right (though i don't think so). but until you can know for sure, at best you're being intellectually lazy, at worst near-libelous...
3) my success and decline--i suppose you have to call it that, but i'm ok with slowing down--has been affected by everything i've listed above, and probably by other things i can't think of. for example, there were times where coaching helped get me more fit running with kids, and there were times where it got in the way of racing opportunities, but i enjoy coaching more than i enjoy racing. i actually have a fair amount of confidence that if i could devote as much time as another elite-turned-master-miracle in running shoes, sean wade, who is very upfront about his meticulous and time-consuming devotion to chasing records (and the fact that he has the time and money to do so), i could either approach some of these records and perhaps surpass them. but if "ifs and buts" were candy and nuts...
4) you talk about the "decline in elites" as if there's a large enough sampling statistically to really get a handle on it. now if you're talking about the decline with masters runners, that pool is large, but ever-changing and nebulous (comparing aging in the 70s, 80s, and 90s may be far different than now); if you're talking about professionals who've stayed in the sport past their 50s, that pool is pretty small, and, at least at this point, changing less. last i heard, whiteman (who's set multiple records in his 40s) is done competing, and i seriously doubt meb or lagat will continue past 45, at least on the track (which meb gave up a long time ago). so really, you're dealing with test subjects of one. which means i may not have anything to offer anyone further than the tip of my nose...
end of my story, but i'm still sticking to it,
cush