There is a GPU miner that is getting incredible hashrates and is being kept private.  I do not fault the developer for deciding to do that as it is his work and he can do as he wishes as would I.  But If they are getting the performance that has been suggested and is kept private it will not be good for the coin.  They might make short term profit but it will harm the coin long term.  If it takes a hard fork to rectify this then so be it.