Why are you using 200m for Bolt and 100m for Lewis?
Lewis didn't lower it by almost a second--he lowered it 0.81 to be precise.
In 1979 Lewis was not training for the 100m. Under Tellez, he went from 10.67 to 10.21 in one year, which is remarkable--but his baseline 10.67 was essentially untrained, so the improvement is not really that surprising.
Plus, he was still young, and improvement is to be expected.
More amazingly, the next year he ran 10-flat and was ranked #1 in the world.
All this while there was no change in his physiognomy other than what would normally come with maturing between the ages of 18 and 20.
Bolt, on the other hand, by the time he was 18, he was a 200m specialist, along with the 400m. He had been running it, and running it well, for a long time, as his time at 15 shows.
Bolt was already 6'5" at age 15, and his early development combined with his specific training account for his advanced success in the 200m by age 18.
If you want to compare progression, consider this: Bolt in 2007, at basically 21 yrs and 6'5, ran 10.03 (+0.7).
ONE YEAR LATER HE RAN 9.69 (0.0) WHILE GOOFING AND LEANING BACKWARDS. THAT WAS A 9.58 RUN THAT HE SCREWED AROUND ON.
IN ONE YEAR HE IMPROVED BY 0.45s, ESSENTIALLY THE SAME AMOUNT THAT CARL IMPROVED BY IN ONE YEAR.
CARL WAS STILL MATURING DURING THAT YEAR WHILE BOLT WAS ALREADY MATURE.
CARL WAS NOT TRAINING FOR SPRINTING FOR HIS BASELINE WHILE BOLT WAS TRAINING FOR SPRINTING FOR HIS BASELINE.
CARL'S IMPROVEMENT TOOK HIM TO 10.00 AND A WORLD LEAD, BUT A FULL 0.05 FROM THE WORLD RECORD, SOMETHING THAT WOULD TAKE CARL ANOTHER 6 YEARS TO ONLY EQUAL.
BOLT'S IMPROVEMENT TOOK HIM TO 9.5x AND A WORLD RECORD BY THE LARGEST MARGIN IN HISTORY.
IN HIS SECOND REAL 100M, HE RAN WITHIN 0.02 OF THE WORLD RECORD.
BOLT SET THE WORLD RECORD IN HIS FIFTH SENIOR 100M RACE, WHILE LEWIS ONLY EQUALLED IT AFTER TRAINING AND COMPETING FOR 8 YEARS.
And there is lots more, but that is enough for now.
So in conveniently ommitting many facts essential for the understanding of this issue you have done all of us a disservice, although your attempt at a comparison is probably well-intentioned.
Make no mistake, I understand what you're saying, and I appreciate that Lewis' progression in the 100m was fantastic--but when you consider other facts, it is not in the same league as Bolt's progression in the 100m--nobody's ever has been.
Bolt is for sure a huge talent, and again may well be among the best 3 or 4 ever--but his 9.69 and 9.58 are highly suspect, especially considering that the 9.69 is believed to have been an honest 9.53-9.59 without all the stupidity.
And the concurrence of the implementation of a new anti-doping regime in Jamaica and the dramatic fall of Bolt's times is very suggestive--although I admit the fall in his times has also been concurrent with Bolt being injured...
BUT we have no basis for our knowledge that Bolt is injured, save for his own testimony and the testimony of those who support him, neither of which carries substantial weight as they are entirely self-serving...
BUT we DO know about the new Jamaican anti-doping regime, and the problems with the old regime it has replaced. We don't know exactly the effects of the changeover, all we know is that there WAS a changeover, and that is more than we know for certain about Bolt's injury status.
I would dearly love to believe that Bolt was clean, I just cannot.
HOWEVER, if he either this year or next, runs mid-9.8x corrected with a crappy start, but demonstrates substantially better starting ability on a completely separate occasion, I would be willing to entertain the suggestion that he could run a 9.6x clean, with a +2.0 wind and a great start.
And if he goes even faster than mid-9.8x corrected, I will have to concede that 9.5x was for him a possibility clean, and at that point I may need to revise my beliefs in light of the new information.