the more i think about it, the more i feel that the J-20 was readied much earlier ago than december 2010. the fact that it's not in yellow paint means it probably had flown in its yellow stage earlier prior to this, so in a way, the J-20 may not be just a simple prototype, but a product very close to operational status. this current paint may mean not only to "dress it up" for the show, but perhaps it's also ready for advance testing, so the project is actually much ahead than most of us had anticipated. the leak must have been intentional, expecting it to hit the public and mass media thru viral marketing. this may be a message to the 3 aircraft carriers(as some video mentioned), so PLAAF is just revealing it earlier than scheduled. sorry if this seemed farfetched, but all these exposures are no coincidence, which is definite, if the rest of my arguments are to be dismissed