If the efficiency is 5-6 times that of a CPU, it's still a far cry from Bitcoin's CPU-worthlessness. It would be interesting to see the math concerning how worthwhile it would be to mine BTC vs LTC on a theoretical GPU scrypt miner.

Perhaps the ability to mine LTC with a GPU will still be moot. If it's more economical to mine for BTC and buy LTC with the profits, it would be foolish to mine LTC with a GPU even if possible.

Anyone like crunching numbers? What would the price of LTC need to be in order to make GPU mining worthwhile? I don't think we're there, but like I said, I haven't run the numbers at all.