City defeated Manchester United 2-1 in the Manchester derby at Old Trafford on Saturday to maintain their winning start to the new Premier League season.
Former Newcastle United and England star striker Shearer analysed the game for The Sun, indicating that some of Guardiola's customary game style from his Barcelona days was evident in their performance, particularly in the first half.
"It is beginning to look like everyone at Manchester City is buying into it, although it will take time for it to click for a full 90 minutes," said Guardiola.
"That is the most worrying thing for the rest. In the Premier League they have had two really good halves. The first 45 minutes at home to West Ham and away to Manchester United.
"Both times they let their opponents back into the game.
"Yet they have won six out of six in all competitions.
"You could see traces of Pep's Barca in what they were trying to do at Old Trafford on Saturday."
Shearer added: "The City players were 50 per cent sharper than United in every phase of play in that first period.
"That is after a couple of months of Guardiola's guidance so imagine how good they are will be in six months."