The pre-season 9/5 (2.80) favourites fully justified their price and in truth, never looked in danger of doing anything other than cantering to a third top flight title in seven years. It was a matter of when, not if.
By the end of September, City were odds-on with the bookies and their emphatic form means both the total points and goals scored records are well within reach over the next five matches.
Few would have predicted the circumstances under which Pep Guardiola's men would officially be crowned as champions, though.
It looked as if Manchester United's 250/1 (251.0) comeback from 2-0 down in their derby clash would ensure City needed to win at least two more games in order to establish enough of a gap to their rivals, even after Manchester City emerged victorious against Tottenham at Wembley.
That was until 18/1 (19.0) shots West Bromwich Albion won just a second away league game of the campaign at Old Trafford on Sunday afternoon. Jay Rodriguez's second half winner was a massive shock to fans and bookmakers alike.
United had begun the game as red-hot 1/5 (1.20) favourites to secure three points and keep the champagne on ice for at least one more game at the Etihad.
Before Sunday's defeat to the Baggies, United had dropped just five points at Old Trafford in the entire campaign and three of those game in the first derby meeting back in December.
Mourinho's men had been on a five game winning streak but lost at home to a side starting the day bottom of the league for just a second time in history.
Darren Moore has picked up four points from two games in charge as caretaker but West Brom still sit nine points off safety and are heading for the Championship next term.
Stoke (1/7) and Southampton (4/9) are expected to follow them to the second tier while Huddersfield's weekend win over Warford at the John Smith's Stadium means the Terriers are now 4/1 (5.0) for the drop just ahead of Brighton at 9/2 (5.50).