I've never had to wait more than a few minutes even during busy times either. A 30 minute wait would be unheard of ... did something happen to stall the line? Or were all the lines like that? I could imagine it first thing in the morning if people are waiting for the parks to open, but then again I'm never awake that early so I can't verify
As an aside ... the protocol for those lines always have me scratching my head. The security folks always take a while to thoroughly check out my kid's wheelchair storage area plus my wife's purse ... but since I never carry a bag into the park, they just let me walk right through, loose shorts or baggy jeans with hoodie and all. I'm a really skinny guy, and not that I would do it, but honestly, I could be carrying anything on my person in my baggy clothes, and all that gets checked are bags and purses? Something doesn't quite line up there, at least from a security standpoint

It would make more sense if they had metal detectors or pat-downs and other measures afterward, but just a quick scan of bags seems like sort of a, in-between no-man's land ... enough hassle for some people, but not enough oversight for others. I'm not advocating that everyone goes through a thorough security screening that holds things up, but the cynical side of me really thinks these aren't so much "security checks" as opposed to "bringing your own food checks". See how quickly cynicism sneaks up once you leave DLR? Just got back late last night and I'm already looking at things through suspicious instead of whimsical glasses

Me thinks it's time for another trip!