As of September, U.S. Customs and Border Protection (CBP) is optimizing processing for first-time Canadian TN and L applicants at 14 designated ports of entry including 4 preclearance locations. According to CBP, optimized processing will ensure a more efficient approach to processing the high volume of applications received every day. Optimized processing is only available at certain times for some ports. For a complete list and additional information, please see http://www.cbp.gov/travel/international-visitors/canada-mexico-travel. We will see if optimized processing is good or bad thing and will provide an update once we have more information.