It seems that PoW coins, other than bitcoin, are very susceptible to 51% attack.
From whom?
The bitcoin guys!
luke-jr proudly admits to having attacked coiledcoin
now it seems AUR is under 51% attack,
https://bt.irlbtc.com/view/546338.0The AUR thing might be false claims, but it does seem that the bitcoin camp views any non-bitcoin to be worthless and they will do what they can to make it so.
I am glad that with NXT, all their hashpower is useless, other than to mine darkNXT
James