at least there is a separate immigration/security area at T3 (as long as yourluggage is checked through) for transit passengers...there should be a CO rep at a desk to left as you come down the escalator to baggage claim (bag claim will be on your right)...check with them re: boarding pass,etc, then quick immig/security (i did a 9W-AA connection..took about 22 minutes from about midway in coach to the intl departure lounge).