Guys,
This forum is about airports as well as routes and I think that Caravaggio has a good point - the airport should be working hard to give a passenger the best possible experience. We can all highlight airports where there has a been a long wait for security, but in general I wait less than 5 minutes to clear security, even at busy periods, at most airports I travel through both in Europe and Asia - less than 5 minutes at both Hong Kong and Haneda this week for example.
Like others, I have had a good and bad experiences at Manchester - the bad ones are always when they have insufficient lanes open and lack the staffing/flexibility to open extra ones. They could learn lessons from LHR T5 which is much improved in the last 12 months..... nobody shouting or being aggressive, smiling staff, and a pleasant experience with all lanes open on every occasion I have been through. The key to this improvement, I think, seems to be having at least one duty manager in the security area at all times.