[f5fstop]

Take some duct tape, and tape across the top of the windshield where it meets up with the trim. Take it for a ride, if the noise is gone, there could have been a sealer skip at the plant where they apply the urethane before the windshield is installed.
If the noise is still there, remove that tape and tape down the A-pillar molding especially where it goes inward toward the center of the vehicle. Go for another ride, if this is it, the A-pillar molding is not fitted correctly.

You can do this, or the dealer will, but no guarantees they will take the time. Dealers also have electronic leak detectors that they use by closing all the doors and windows, turning the heater blower up to max, and then run a wand around the front area. An air leak will register on the meter.