We were at DL yesterday afternoon/evening. We had a 1 day, 1 park ticket with G+ that we'd bought months ago. Our plan was DL yesterday on arrival day, OBB tonight, then off to the cruise port tomorrow. So not a real DLR vacation, just a couple days tacked on because we were here anyway.
My mistake was not doing more research before buying G+. We are WDW APs, so I made the stupid assumption that it worked the same way. Doh! G+ was useless yesterday with our late (2pm) arrival combined with the crowds, the weather and the breakdowns. At WDW, I would have been stacking LLs all morning pre-arrival. At DL, by the time we got there only crappy rides and/or very late return times were left. And we knew we wouldn't make it to park close because we were on east coast time.
Used LL for IASW and Buzz, did Nemo sub, Pirates and Jungle Cruise standby, ate at Blue Bayou, shopped a bit and gave up. Indiana Jones was either down or had stupidly long lines pretty much all day. HMH had very long lines and no LL return times by the time we scanned into the park, so didn't bother with it either. Luckily, our goal was dinner and only the couple of our favs that are different or not at WDW, so it wasn't the worst outcome for the day, but the G+ system is way more effective at WDW. No idea why, but I'm not sure I'd bother with G+ at DLR on future trips, even though we always buy it at WDW even for a short day.
I do not envy DL regulars. Your park and your G+ system is a mess.