Arsenal have some pretty favorable games before the World Cup too, no reason they won't be top when everyone jets off:
Leeds (a)
Southampton (a)
Forest (h)
Chelsea (a)
Wolves (a)
If they're top when the break does occur, its going to be really interesting to see if their current momentum carries on when the season re-starts, and to me it'll be how they respond after that break to see if they're genuine title contenders.