The ongoing theme here seems to be that somehow the top track athletes do not care about track. Pro athletes. And that somehow you are dismissing arguments based on "some guy somewhere." You can't be the fastest man in history, best football player in history, if you are someone somewhere not doing track or football, or any sport for that matter.
"Participation is overrated because most people that participate don't take it seriously" This makes no sense to the argument because a top elite track athlete like Bolt, is past this participation level and is committing himself to becoming the fastest man ever. Much like any other football player who is only a a pro football player, and because he commits himself to his training day in and day out.
"More quality people enter football than track. Even football players that do track generally don't take it seriously. Can you name a famous football player/track athlete that picked track over football? I can't."
And that somehow these football players when they are football guys running track, don't care about running their fastest, and are not trained by head track and sprint coaches at their universities to become great sprinters, when not playing football, do their football coaches coach them during track?
You talk about bad coaching, in a niche sport, yet the USA has multiple guys who are tops at the international level. Where one may see football players doing more lifting, hitting, etc. does not mean they are better trained than track athletes. They train for Football, that is different from track. And every sport is a niche at the topmost level, because only the best of the best have made it.
As a last note 40 yard splits from top 100 guys are "en route" this is important because they have a longer acceleration phase then if it was a 40 yard race... what if they trained for a 40m? and what if "you subtract .24 from top splits of 40's and then "start the clock by hand" (last vid) that will take another bit of time off...
"Track coaches go to Pro Timing Days, and they see scouts starting their stopwatches with their thumb, which has a slower reaction time than the index finger. They see them crowding the finish line and anticipating – guessing, basically – when someone will cross it. They see running surfaces that weren't professionally measured or leveled. They see no starter's gun, no automatic timing device, no wind gauge."
NFL Combine 2009 fastest 40 vids talks about the "Electronic timing at end"
http://www.youtube.com/watch?v=GGc0tCCzkmA&feature=related
http://speedendurance.com/2009/08/06/40-yard-dash-times-for-usain-bolt-and-ben-johnson/
(some interesting stats)
http://legacy.signonsandiego.com/sports/20050418-9999-1s18forty.html
(more on the accuracy of the 40)
Now I love football, don't get me started on Dante Hall's insane runs that are my all time favorite highlights, the grit of the game, that feeling on the field.
But to say this same grit, and intensity, anticipation does not exist in track, and that somehow these guys are not training hard is just not true.
The fact that some athletes make it look easy... does not mean it is easy this is true in all sports so stop ignoring it. The best, are the best for one reason because they work and push themselves to their fullest.
An all time favorite Michael Jordan video...
http://www.youtube.com/watch?v=woOu_4l3lio