Much has been made of the debate between which league is the best in world football. The Premier League is arguably the most competitive; La Liga has the biggest stars and Serie A is a hotbed for young talent. Each league has it's own pros and cons, and a different style of play is needed to succeed in each. When a player moves to the Premier League, they must, through unwritten ruling, be given a certain amount of time to "settle" into the league before being judged and praised/ridiculed....
Source: 90min.com