Grand Slam Track definitely impacted performances at the world championships. Grant made his move a little too early with 200 to go and then he was done. You have to admire the fact that he sustained so many incredible performances over the past many months. That large group who remained over the last 4 laps ran the last mile in four minutes and two seconds. It was a great race to watch. Perhaps the humidity had something to do with all athletes performance, but it was so exciting to see so many athletes in the running for the gold, silver and bronze. Let see what happens in the 5000. Not sure if the 1500 is impacted by the Grand Slam Track as much as the 5k and 10 k. Bottom line, these guys are incredibly talented and dedicated to training at such an unbelievable level to perform the way they do. Amazing stuff!