ASIC miners won't make it out into the world fast enough to drop the average time between blocks dramatically. At least, it seems very unlikely to me; the difficulty will just slowly go up to go along with the new mining power. (For those who don't know, there's a difficulty value across the network that keeps the average mining time between blocks (currently 25BTC, or $3325 at time of writing) at an average of 10 minutes, to ensure a continuous release of bitcoins.)