You could run your last 800m in 1:45.20 and you would still lose to El Guerrouj in the Olympics... ask Lagat.
El Guerruoj's last 800m at Athens, 1:45.19 (53.28/51.91)
The top level 1500m runners of the world make running sub-1:48 look commonplace, and/or just automatic, and with all do respect to Symmonds, et al, the level of racing at the Olympics is just another stratosphere.
Now, I understand that El G is retired, but now I fully understand why Webb & Raczko must focus on Webb's speed if he is ever going to fully contest for an Olympic or World medal.
I've seen that 2004 Athens race a hundred times, and the 51.91 closer just blows me away every time. That is flying, as any 800m runner.