I think it is unrealistic for Pochettino to help Chelsea get to the top of the league with just 2 months into the new job; new players and new signings too. Pochettino has alot of tasks and work to put Chelsea in place; determine a starting 11, develop the team rhythm and chemistry before even thinking about a title challenge.
Worst case scenario, i think Pochettino should be able to get Chelsea to fight for an Europa league position because even Champions league football is far fetched (atleast on paper).
It is extremely premature to draw the conclusion that Chelsea are going to start win games; we're yet the opportunity to witness them perform on the pitch, like Manchester United did yesterday. The players are eager to make their club debuts; nevertheless, we should take an additional look at the roster; I don't believe they are currently ready to play games. Mauricio Pochettino has quite a bit of work to complete at Stamford Bridge. He has the ability to either boost or degrade the club's performance, depending on the strategy that he implements.