Ayana deserves a little bit of respect here.
First, all of the medal winners have to undergo testing. That is how Ben Johnson was caught in Seoul.
Second, the race conditions were absolutely perfect (mid-60s and a light rain for a distance event with little or no wind).
Third, Ayana basically followed the fourth place finisher (Alice N.) until she decided she was eady to continue the blistering pace with a few well-timed 66 second laps.
Until there is a positive drug test or unless there is a positive drug test, Ayana deserves full credit for the win and world record.
The sour grapes spewed by Sweden's Sarah Lati and former Irish standout Sonia O'Sullivan are merely the words of sore losers. Ethiopian and Kenyan runners have always been near the top of the distance running competitions for decades. Could it be their unique altitude training advantage may have been a real benefit since Rio de Janiero is barely above sea level for goodness sake.
Again, wait for the test results of the medal winners. Otherwise, enjoy the fact you may have witnessed a historical performance for the ages.