Somewhat agree wrote:
I’ve thought Josh Kerrs trajectory was a little sus, but then again, I think I remember reading he lost like 10 lbs and got crazy lean and dialed in his diet, which could all explain his results. George Mills really seems to have a normal progression. He’s pretty subpar, starts training at altitude, PRs get faster, has some bad results, trains harder, better results, and keeps getting faster. I think his progression has been fairly linear. The jump from a 12:58->12:46 5k is a little strange but they were 14 months apart and indoor vs outdoor.
He's moved his whole life to altitude, it's not like he's just doing a few weeks here and there. And he's been out there for more than two years. He ran 7:27 for 3000 indoors, pretty much solo, so 12:46 isn't massively shocking.
As for Habz. It's very surprising that he's hit a time that is usually reserved for greats of the sport. However, despite what the OP said, Habz is nowhere near the level of Jakob and Kerr. Those guys are multi-time global medallists. Pulling a fast TT out of your arse doesn't make you a great, titles matter.