In this case, the leak was from a Chinese Baidu Naruto subforum. If there was any information attached, it would be lost in translation.
Secondly, it seems like the images may have been uploaded onto the official website's main server. Official websites do that all the time (for example, FFXIII uploaded a bunch of screenshots with the Xbox buttons photoshopped onto the PS3 buttons, but was never intended to be seen by the public).
I don't buy it. Because wouldn't someone grab the pics and then at least jot down or memorize some info on who are these characters and designs are before send them off as a leak? Lost in translation, my foot AND ass.
I seen tons of leaks, some I can tell but that's another time but this one, is giving me tons of doubt.