In a normal DL? Or a time trial?
Do you guys know what the weather is normally like in the average DL meet? Noting close to what you had last night. Cheptegei ran 12:35 in 79 degree temps with a dew point of 69. If Cheptegei had run his race with same temps as Grant and with wavelight starting at a slight negative split, he'd break 12:30.
How often is your DL meet run in a temp of the 50s? Hardly ever.
Look at Mo Ahmed. He ran 12:47 in Bowerman time trial and 12:58 in Europe.
See above. He's officially 27 seconds behind Cheptegei (I'd argue Cheptegei's WR should be considered to be the equivalent of 12:30 so I'd say 32 seconds) and 15 seconds behind Ahmed - his own teammate who has world bronze.