1) I don't personally care. I bet those who do care are the genuine juniors who lost out to this guy (either progressing through heats or medal wise) at age group champs. Furthermore if I was a talented junior at say 1.47 level I'm not sure how I would view my future prospects in the sport seeing one of my age group 'peers' running as fast as arguably the greatest MD runner of all-time (S.Coe) did. No it doesn't affect me, but it impacts the future of sport.
2)Okay I did: Here is Kipketer
1989 1:47.2 Nairobi 13 OCT
1990 1:45.7 Nairobi 20 JUL
1991 1:46.19 Malmö 05 AUG
1992 1:45.62 Helsinki 30 JUN
1993 1:45.46 Lappeenranta 27 JUL
1994 1:43.29 Oslo (Bislett) 22 JUL
1995 1:42.87 Monaco 25 JUL
1996 1:41.83 Rieti 01 SEP
1997 1:41.11 Köln 24 AUG
Since you are a strong numbers man you can see that from 1989 to 1997 Kip dropped around 6 seconds in pretty expected fashion - the average drop is approx 0.75 seconds with his biggest jump coming at the age of 21 where he drops 2.17 seconds. I would like to know what you think is unusual about this?
Conversely Nijel Amos drops from 1.47.28 to 1.41.73 in ONE season (5.55 seconds) interestingly enough taking one season to do what arguably the most talented (at a minimum one of the greatest two) 800 meter runner took 7 years to do (if we just for arguments sake take Kipketers 1.41.83 in '96 as the closest time comparison). To me, this is extremely unusual. How about I challenge you to find an example of an athlete that ever progressed to such a level, in such a short time, at such a young age.
Lets not forget to take into account Kipketers history of talent. What do we have for Amos - a 2.25 1000m and 8.33 3000m in 2010? Really, this is your argument?
So lets get this straight - Kipketer takes 8 years to dip under 1.42 at the age of 23 and Amos takes 1 year at the age of 18 and Amos is an 'exceptional talent'? Then what exactly does that make Wilson Kipketer? If we base it off the facts we see here I would say that you could only conclude Wilson Kipketer was decidely average? I prefer to look at Kipketer as the greatest talent we have ever seen over 800m - from his record breaking ability and title winning ability through to his longevity and not to mention glorious running form.
3) Your last comment is disappointing as I fully respect that you know better than to make such a statement. No one drug affects any one athlete the same and they certainly have different affects on a young but grown man in his early twenties as they do on a boy at 17 - or do you disagree with this too just for the sake of disagreeing? I'm sure many also try. I'll give you one example because I am running out of time - Rashid Ramzi. Went from 3.44.85 at the age of 21 to 3.30.25 in the space of two years. So yes, coaches and athletes do try it - and also get away with it.
Maybe Nijel Amos was just a perfect candidate who then fell into the right race at the right time - its certainly been done before.