The Vendée Globe began last Sunday and will probably last for about 75 days. A leaderboard is regularly updated, which can be accessed here.
Thomson is currently in the lead, followed closely by Le Cléa'ch and JP Dick. However, they are not following one another but rather appear to be on the same line, descending SSW. This is because Thomson chose to jibe to take advantage on the stronger winds near the Portugal coast, Dick did the same but to a lesser extent, and Le Cléa'ch stayed the course. Their trajectories can be seen below on the screenshot.
Now my question is: what are the criteria used to put Thomson before Dick and Le Cléa'ch in the leaderboard?