Windy conditions. Same night Sally Pearson was running into a -2.3 headwind. Gregson tore up the last 50m to produce a gap. Should be noted that this was one race. 'Olympic Trial Meet' here in Australia means nothing. Selection panel is all over the place, stupid rules and regulations.
The big challenge with gregson will be staying injury-free. Seems the past year or so something is always troubling him.
Also for those who are interested: Collis Birmingham is the one to watch in the 5000m. He ran 3.35.74 just the other week.