Originally Posted by hhdl

Luck of the draw, but if you arrive at one of the gates which supports airside arrival (which is to say L concourse), your connection to 2F would be by walking. With an early enough arrival at one of those gates (even not using e-gates for passport control) it could be 15 minutes from plane to 2F lounge.

For the other 2E concourses, the connection to 2F requires going landside, but you're not taking the blue shuttle (that's airside and for the opposite direction). From the K gates it's a walk, and from the M gates it's a people-mover to the K gates and then a walk.