DCA has one and it usually is a time saver, but not always.
BWI has one, but again it is not always a time saver.
STL has one and it's a huge time saver. A concourse security is a pain.
Most major markets have elite security lines.
I really liked security at ATH. Upon checkin the DL folks give GM and above an invite to the swissport lounge. The lounge is before security. When it's time for your flight they take you to a fast pass security area. Security too 2 minutes.