I think it's a near certainty that someones ASICs are already up and hashing, if only in a testing capacity.
on a testnet though...
What are people who vote "ASICs are already hashing" thinking? The network hash rate has not skyrocketed - it follows the price as usual, indicating no change in technology.
Unless of course ASIC hash rate gets added so far at the same rate as GPU miners leave for Litecoin, and a skyrocket of the Litecoin hashrate has already happened. So, unless you think people are buying GPU farms to mine Litecoin, that Hash power is coming from somewhere and it's obvious that it should be detracting from the Bitcoin network.