Even Manchester City are not really doing well, their performance had dropped since last season.
Last season was one to forget for Pep Guardiola and Manchester City, but they are doing much better this season. They are not yet at their best, but we have to remember that even in their good seasons, they are usually impeccable during the run-in. So we cannot actually judge them now, if they stay close enough to the top of the table, then in March or so, they could kick into their best and go on one of their famous winning runs, which more often than not culminates in City winning the title.