That doesn't mean they are that much better at winning all the games they are supposed to than any other team. Let alone at that outrageous pace.
The Rockies are really good at home. The Braves are 1-2 against Arizona. Even Miami, they are just 9-7 (the Nats, they own). You just never know. Of course they could also take any or all of their games against the Yankees, Dodgers and Giants series.
Or, the Braves have quietly been the best, but underperforming team in the division all along, and have finally hit their stride, helped by deadline acquisitions. Whereas we're the same .525 team we've always been (at best) and the deadline adds merely maintained that.
In any case, Phillies are still 12-8 in August. If they can play 600 ball the rest of this month and September they should be in good shape. But not if the Braves play .842 ball - or even .650 given the lead they've opened.