Nonsense - the blockchain was not observed by ANYBODY that is known here on Bitcointalk, on IRC, or even on a cryptography mailing list. Not a single known person has come forth and said "I've had a full node since the middle of 2012, I can vouch for the validity of the blockchain". Given that the whitepaper is dated September 2013, and the first github commit is November 2013, there's no evidence that it existed before November 2013. Its first proper public release was in March 2014, by which time 82% had been mined. Falsifying the blockchain is trivial, and this is doubly so as BCN was released with a purposely crippled miner that did insanely stupid stuff like recalculating static values in each iteration of a loop (doing this by accident is a practical impossibility given the generally ok-written code).

It NEEDS to be listed as "significantly premined" until there is overwhelming evidence from people who are known in this forum or in cryptography circles that its claim of being 2 years old is true. Even IF it is true, the fact that it was unavailable to anyone for 2 years and then suddenly released publicly would likely still count as a premine.