I have nothing against EMA but in my experience if there are more than a few flights boarding around the same time, the security queue is huge and there is absolutely nowhere to sit once through their version of a shopping mall.....
That is the experience of EMA that Mrs ATN reports on her regular commutes between EMA and GLA. Security queues designed to force / encourage PAX to use the (paid for) express lane. Not much different to most airports I would suggest.