Deano, you are making too many assumptions. You don't know the shoe Brazier is wearing and he won the World Championship, something Coe never could pull off in '83, '85, or '87, in normal spikes.
I think Brazier could run 1:40 barefoot. With him it's about his form and power. He is a stallion like Juantorena, not a science experiment like Coe. Remember, Coe's 1:41 had suspect timing on a track they have since destroyed because it was considered like Stanford's track back in the day.
I've seen enough track and field in my time to know that Brazier is the real deal. I think he will threaten the WR quickly and needs to race as much as Rudisha did to refine his skill and sensations over the last 150m when running though 600m in 1:14 or so.
1:41 has been run July 10 or earlier by four different people. Rushisha, Kipketer, Coe and Amos.
Rudisha did it three times himself.
His world record in London was August, not Sep/Oct.
When you look at the PRs of 1:42 runners, the dates they did it are all over the place.
Peter Elliott ran 1:42 in May.
And having no championship this year is even more incentive to not worry about timing your peak fitness for later in the season.
There is plenty of evidence he could run really fast Aug 14.
I don't think you've got the point I was making!
Firstly, I was referring to Brazier's World Champs victory last year when mentioning Sept/Oct. Nothing to do with Rudisha!
Secondly, I was responding to a poster who implied that Brazier would automatically be faster now in a one off timed race than after rounds in a Championship final. I was suggesting that this isn't necessarily the case, citing Rudisha as an example, and that sometimes, when the pace is given in a final, you can run faster in a championship race because you tend to be at a season peak.
Thirdly, Elliott's 1:42.97 was basically a 1:43, abd I know Brazier is capable of faster than that.
In summary, I think Brazier is capable of a pb in Monaco, but a 1:41 performance now (2020) is not quite as impressive as a 1:41 from 40 years ago, when they were running on inferior tracks with inferior shoes.