I think smooth's point regarding off-chain/on-chain privacy leads to an important question: if you're going to depend entirely on off-chain privacy, why not just use bitcoin?
Because with bitcoin you can't do it trustlessly and decentralized.
Bitcoin plus dark wallet is probably better than DRK, assuming it gets popular enough, and maybe already. For one thing it has stealth addresses and DRK does not.
Except that Darkwallet transactions can be deanonymized, and there's likely nothing they can do to fix it.
Wrt instamine - in the big picture, we are all still instamining. When/if the mass adoption and wall street level investing occur, it doesn't matter much whether the instamine lasted for 2 days or 2 years.
