Yesterday i saw Geoffrey and some other elite guys running in the Central Park, i followed them about 50m behind, they were jogging at around 4:30/km.
After a few km, they got a little faster and soon after Geoffrey accelerated and i definitely couldn't follow, it was probably under 3min/km pace for a few mins. When i passed him a bit later i have to say he looked like he just went out for a walk, all smiles, no sweat... It's in a league of his own