When we visited last year in October we didn't have any issues with the queuing. Sometimes the queue itself took slightly longer to be dealt with, but the delay did not impact on our days at the parks at all. Guess you win some and lose some. With us traveling just as a couple we also help out security by packing light and tending not to take rucksacks with us. Yep, that probably means that if we're shopping and buying in the parks we'll end up with a few carrier bags, but this usually isn't a problem.