"Metal produced" should be one of the best stats to look at to know who's doing well.
Currently, "Metal produced" includes reclaimed metal, but it also takes into account situations where you put a forward lab, and reclaim the back one, or when you reclaim a freshly built t2 lab.
On the extreme, you can have one builder building and reclaiming a solar, and you'll always top the chart.
That's not "Metal produced", it's maybe "Metal relocated".
Screenshot explanation - Chisato is the first player to reclaim his lab, hence the 1k lead at 5 minutes in.
good thing OS is based only on winrate and not game stats 🙂