I too don't favor separate lines for elites.

Incidentally some of the some worst lines I've faced were in Europe. And while there were separate lines for coach and business/first, there were no separate lines for elites (in Amsterdam security check at gate for connecting flight) - and all of that delay was for asking the standard predictable set of questions which terrorists can easily bypass.

The system must be fixed and the delays must be addressed, but separate lines is not the solution.