Well other than a more secure network, for the first few weeks as new ASIC hit the network and blocks are found a little faster than normal confirmations will go quicker to, correct? If I understand things correctly short block discovery from an abnormally low difficulty will allow for quicker confirmations. Then after each 2016 blocks it will adjust. So there should be windows of time that blocks are found quicker than 1 every 10 minutes. At least until we get the bulk of the ASIC on the network.
I guess it might not even be that noticeable, but its a thought. What are your thought's or expertise?
If faster confirmations were universally accepted to be a good thing we would decrease the block time.
Disclaimer: I believe faster confirmations would be a good thing, but recognize that others don't.