I've raced quite well, for me, when doing WU + some race pace stuff + CD most days, where WU + CD totals about 30min worth of jogging. I could do that all summer, and still do a decent Mile. I'd be useless at 10km, but I didn't care.
And then we have Bannister.
430 might present some shocking ideas, which might get ridiculed, but I like that he is THINKING beyond accepted norms. Many train blindly.