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1) Getting through the first hours without major breakages (unlike Ericsson)
2) Heading straight south for the stonger winds (unlike movistar)
3) Showing its edge in boat speed to get her nose ahead (of Pirates)
4) And the lucky bonus of the front to jump 300 miles ahead (of everyone)
Now past the gates ABN AMBRO ONE is unconstrained in latitude and has turned sharply south through a remarkable 90 degrees. It's a bit surprising - they can surely gybe over a smaller angle. As there's no geometric reason for heading south it can only be the hunt for wind. And as can be seen from the NOAA figure below, there isn't much wind at 40S but much more at 45S.
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So while the stats show the pack catching up dramatically - already a hundred miles have disappeared into sea spray - there's still only one boat dominating this leg.
Figures from Virtual Spectator and NOAA