Week 4 games of the EPL

Man City setting the pace, Arsenal with  under par performances,
Chelsea huffing and puffing, Man United not clinical in the final third
despite high possessions, under performing Liverpool, Tottenham can't win a game, and Southampton yet to impress. This has been the story of last season top seven teams in the EPL this season.
Let's take a look at the results of week 4 games.
Newcastle 0-1 Arsenal
Tottenham 0-0 Everton
Liverpool 0-3 West Ham United
Chelsea 1-2 Crystal Palace
Man City 2-0 Watford
Norwich 0-3 Southampton
Swansea City 2-1 Man United
Man United, Chelsea and Liverpool all failed to get a single point in
their games, with Man United having -1 as goal difference, Chelsea also
have -1, while Liverpool have -3, making Liverpool our biggest loser
for the week.
Arsenal, Southampton and the consistent Man City recorded maximum points. Southampton has  3 goal difference, with 1 and 2 goals more than Man City and Arsenal respectively, making Southampton the biggest winner for the week.
Can Southampton continue to impress? Can we also say that we already know where this trophy is going to by May?