A whole 2 runners? Running must be the only sport where competitors lack self belief until someone is better than them. It now appears they have lacked self belief for decades, right up to a few weeks ago.
No but the fact that their shoes left marks in the cinders probably contributed to them not going as fast.
No one has raced on cinders in 60 years. But only now are runners thinking then can go faster because of "self belief". Pull the other one.