i think the age of the player and their previous experience plays a big part in the time they need to adapt. i also take stu's point about players not becoming something they are not, but i don't entirely agree with it.
its completely possible for a person in whatever profession to have qualities and potential that remains hidden until the right set of circumstances bring it out. likewise its possible for certain attributes to disappear in the wrong circumstances. loads of variables such as the training they receive, their happiness in the workplace, the state of the fragile human trait of confidence, inspiration, fitness and so on and on and on and on. i'd never claim to be an expert in football but i think i know a fair bit about human beings, skills and potential.
applying that to the babel argument i think he is a very talented player who lacks a lot of belief in his current situation. moments such as the goal against derby where he took out 2 defenders with a little shift in bodyweight, or the backheel against besiktas, show a natural innate talent that will never go away. what he needs is the nurturing which will allow him to express himself on a regular basis. its there in flashes but these flashes are frustratingly rare.
he was a regular starter last year but in most of the expected and imagined line ups for next season that people have posted he's hardly appeared. everyone's favourite donkey kuyt has even looked to be nailed on at right midfield in a 4.4.2 with barry on the left. given a run at right mid or up front with torres (or even instead of when he inevitably misses the odd game) will, i hope and suspect, show us a lot more of what he is capable of. i just hope that rafa, against his natural tendencies, has put an arm round the lads shoulder and told him the same.