A lot of the blame can also be put on the new security regulations that have been introduced over the last couple of years.
Given all the stuff we are not allowed to bring on to a plane now....and given that a lot of us forget and it ends up being confiscated....all this adds up in time as the security officer has to stop and search us...then add a couple of extra minutes as we argue with them.
Unless they get rid of the stupid baggage item shutdown...it dosen't matter how many stations or fancy new bits of equipment or staff they bring in. The queues will remain.