Nothing in it, just Roseberg's tires went off quicker then Schumacher's and Roseberg pitted first in his first stop as well. LOL typical arsenal fan.
That is exactly what happened, the reason why Rosberg pulled away was because he decided to floor it (+KERS) to leg it from the drivers behind him including Schumacher.
Michael was putting in slower lap times as Ross Brawn and Michael both said, "Michael/I did not use KERS on the first few laps into the stint", keeping the conditions of his tyres in usable condition for his previous stint.
Michael started to catch Nico on his preserved tyres: Team radio : "Good pace-Nico 1.30-Michael 1.29, no need to box carry on, watch out for the orange kerbs".
Rosberg therefore had to pit to change his ruined tyres, the lap time was around 4 seconds, nothing incredibly long about this.
Michael carried on for his longer run with his older tyres and leapfrogged Nico.
He then boxed later into the race, and had maintained the 2.5 second gap that Nico failed to close down on his newer tyres, thus allowing Michael to pull out ahead.
A simple inter-team battle concerning tyre and speed management, Michael came out on top, whether you are in denial or not. The gap is 5 points, both drivers are in a closer battle than last year, either one driver is doing worse than 2010 - or the other is improving, the latter is the most probable.
trilobyte - take a trip to the optician - if you can't see Rosberg thrashing Schuey's times right through until called in prematurely,
then you are a typical myopic footie fan. It was a fit-up to cover Schuey's tender feelings. The truth like it or not.

Read the above statement, also read the India analysis (Mercedes sub-section) on the F1 website, to clear up the matter.
If this was another inter-team battle, it would have been resolved on the conclusion of tyre management issues - Not preserving a drivers feelings <?? WTF.