US Immigration in Ireland

[AndyDRHuddleston]

Hey Folks,

I seem to remember reading a few years back that if you travel to the USA via Ireland, you are actually passed by US Immigration before boarding in Ireland! Is this true? ...and if so, which line do you stand in at the American airport? I cant see the benefits of passing thru Ireland if you still have to wait in the queue at the other end!

I am looking at travelling out via SNN from the UK and this would help a lot if this was the case.

Any Info greatly appreciated.

Thanks

Andy