Guardiola and his players will have the chance to celebrate properly on Sunday when they host Swansea in their next fixture.
Instead of City hoping to clinch the title at home to Swansea next weekend, that game at Etihad Stadium will now be a party and a celebration of one of the Premier League's finest teams which could yet break a slew of records by the end of the season.
United was too narrow and predictable, with wide players Alexis Sanchez and Juan Mata constantly cutting inside and leaving the midfield congested.
And Sutton has slammed the Portuguese, suggesting he should have put up more of a fight against Manchester City's dominance.
The Frenchman was hauled off by Mourinho before the hour mark, making way for Anthony Martial, with West Brom scoring their victor 15 minutes later. United are banned from doing anything but losing at Stamford Bridge under the unwritten law which also forbids United to do anything other than get hammered when they play Tottenham away, one the Reds have faithfully abided by in recent seasons, including this January.
It's the third Premier League success for the club after the titles won in 2012 under Roberto Mancini and 2014 under Manuel Pellegrini with captain Vincent Kompany, David Silva, Sergio Aguero and Yaya Toure involved in all of them.
Mourinho said his players were "masters in complicated football". Everything was slow. Everyone was one more touch, one more trick, one more flick, one more turn. "City won the title because they won more points than us, you are not going to say that they won because we gave them the title. that's not fair to them", Mourinho said.
"In my experience you don't win titles with inconsistency, you win titles, of course with quality, without quality you have no chance, but you have to win titles with consistency at every level not just the performance level".
"I think we were deservedly punished", Mourinho told Sky Sports.
"They won the title because they were the best team, because they won a great amount of points and lost only two matches - that's why they were champions". The Baggies can acquire a maximum of 36 points with four games left in the campaign, but their fixture list is the toughest of the lot with matches against Liverpool, Tottenham Hotspur, Crystal Palace and Newcastle United - all of whom are in good vein of form. It's already a scandal the world's biggest football club have only reached Europe's last eight once in the last seven years.