Don't know if that's the best place for this stats-crowded chart but thought it might be okay here.
The most interesting columns are 4-7, displaying expected goals (xG), expected goals against (xGA), expected goal difference (xGD) and difference between actual goal difference and xGD:
Chelsea, Arsenal, Burnley massively and WBA to a lesser extent overperforming; Liverpool, Spurs, Everton etc pretty much what can be expected; City, United, Southampton, Leicester massively and to a lesser degree West Ham underperforming.
I'm not sure if penalty shots are included because City missed two of them yet which would at least explain some of the underperformance (this would also apply to other teams, of course).
http://www.101greatgoals.com/top-st...premier-league-table-chelsea-arsenal-impress/