Just flew B6 LAX (T3) nonstop back to JFK yesterday. Yes, there is a dedicated lane for Mint pax, and, also for those with Pre-Check (which we've used) and it's much faster. At midday, it took no more than 10 minutes to get thru - as always, YMMV - probably saving 10+ minutes vs. regular pax with full screening. For your predawn flight, depending on # of flights sharing the terminal, lines & wait time could vary Look for an uniformed airline employee for help to direct you if you don't see the sign for the proper lane to get into.