They sent an e-mail to those of us who had already purchased EMS seats prior to the announcement that we'd get to use the "speed" functionality as well. I am not a B6 regular and only use them in a pinch. I assume they can implement a speed lane at security at JFK quite easily, but I'm booked on a LAS-JFK flight and trying to figure out how they plan on implementing it there. Hoping it means we can use the First Class lane at LAS!