They're on pace for low to mid 70's so that's pretty fair for top 4 level. XG differential per 90 is a good barometer too, and they are at 0.72 which is comfortably a top 4 side (we are at 0.32 there which is usually Europa League level, though ours has obvious exceptions I'd say where we have had 3 hammerings - city, Brentford, Arsenal - and been roughly Newcastle level of xG outside of that).
Anyway ultimately a draw is better than a loss, and they're just very hard to beat. Instead of going the Pep route to compete with Arsenal, city, United and Liverpool, they seem to be going the Atletico Madrid route which honestly I don't mind seeing.