Yes, there are staff with boards at the arriving gate. They then hand out a special coloured tag to tight connections, marked "Express Connection", which allows them to use Fast Track and maybe jump a person or two at North Security. Frankly if you have status this will save you less time than the time they spend explaining it all. If you are GGL then Special Services may walk you through (but that really slows me down!). This assumes you are on one PNR of course.