54 days. That's all it took for David Moyes to transform from the humble and reserved Everton manager into the hardened and forthright supremo Manchester United supporters had come to expect after 26 years of Sir Alex Ferguson.
When Moyes began work in his new position on July 1, it would require a concerted effort of digging to the depths of the internet to source anybody willing to opening criticise a man who had, rightly, garnered a reputation as a respectful and professional operator during 10 years at Goodison Park.
Moyes would usually shy away from opportunities to land a blow on opposing managers in pre-match press conferences, and would hardly dare to consider speaking about players from other clubs who had taken his fancy. The Scot would treat other clubs in the way he would want Everton to be treated by others.
But now, having ascended to the throne after the abdication of Old Trafford's king, Moyes is in a position where respect among peers has already been earned, and the 50-year-old would now appear to disregard the need to maintain relationships he so carefully constructed during his decade on Merseyside.
Manchester United's pursuit of Leighton Baines and Marouane Fellaini - two of Moyes' former players - is evidence of this, and Moyes' most recent comments on the delicate situation demonstrate a psychological shift in the Red Devils' coach so soon after his move to Manchester.
The Premier League champions have made a formal offer for Baines and Fellaini, which Everton chose to make public in an act of defiance after what they had deemed to be a 'derisory and insulting' bid for two of their most prized assets.
But Moyes' reaction to the publication of these details has served as the clearest indication yet as to how his inflated his ego has become since succeeding the greatest manager the British game has ever produced.
Perhaps affected by the enduring frustrations of the transfer window so far, Moyes has claimed Everton and their manager Roberto Martinez are holding back the careers of Baines and Fellaini by not affording them the opportunity to sign for Manchester United. Were Moyes in the position of Martinez, he would undoubtedly condemn the actions of a manager at a more prominent club attempt to unsettle players in a side of lesser standing.
Is it arrogance from Moyes? It would appear to be so. And, perhaps more pertinently, this new found attitude represents a sign of double standards in a manager so well regarded in the Premier League.
Manchester City's interest in Joleon Lescott in 2009, albeit through the incorrect channels, riled Moyes so intensely that he branded their behaviour 'disgusting' as they attempted to prise the player away from Goodison Park. Moyes, perhaps as publicly indignant as he had ever been, maintained his desire to keep the player. Sound familiar?
Lescott, of course, departed for Manchester City, and Moyes was left to rue losing his player to a club attempting to construct a side capable of winning the league. A lucrative contract and the lure of potential success won out on that occasion, and Moyes is hopeful that - now on the other side of negotiations - history of sorts can repeat itself.
Moyes is in danger of burning bridges with the Everton hierarchy and their loyal supporters, but this will be of little concern as he bids to make a success of the esteemed position he has inherited.
As Manchester United prepare to face Chelsea in the most important game of their new manager's reign so far, a very different David Moyes is beginning to emerge.
The ego had landed at Old Trafford. But how will others react?