You keep saying it's not true, but what those articles clearly state (and what I thought was pretty common knowledge) was that a few years ago City adopted a style of play that was the same throughout the whole club - just like at Barca. They wanted all the sides throughout the club to play a similar possession based approach. Now I appreciate that not all the managers may have implemented that perfectly, but that was the plan throughout the club. Some ex-Barca player describes it in the BBC article:
"I was with Barcelona for eight years, and what the first team does is the same as what the junior teams do," he said.
"The dynamics between the players are the same, the style of play is the same, and the movement of your team-mates is the same, so as you go through the age groups it's much easier.
"Above everything, it's about learning your position, having a very clear understanding of the concepts of the game and how to control your passes and possession of the ball. From a young age that's what you learn."
It is this kind of approach that City are attempting to follow, and the key element of their youth strategy is a single-minded focus on developing technical skills at a young age
Do you reckon they were implementing all of that at junior levels but just letting the first team crack on without making any attempt to adopt the very philosophy that they had brought the Barca guys in to establish?
If you want anymore evidence then look at possession stats on a season-by-season basis. In 09/10 and 10/11 City were 5th in possession stats. Then in 11/12, 12/13 and 13/14 they were second only to Arsenal, and then since then they've been top every year barring an aberration in 15/16 when Pellegrini basically knew he was a dead man walking from halfway through the season. That feels like something changed within the club to me - them becoming much more adept at possession based football predates Guardiola by 4 years.
But feel free to stick your fingers in your ears if you want.