This is interesting. Having now been briefly to both US parks my personal experience was worse at WDW. Got cut in front of and shoved multiple times there. at DL I was shoved once (into a trashcan unfortunately) but the entire family was rude. I let them in front of me where they proceeded to continue being loud & letting their kids do whatever they wanted. In another line I let a woman with a kid that kept kicking me in front of me, and as she was holding another child and I asked if there were just the three of them. She said yes, but took another adult with her. Finally, a mom sat in front of me with her kids last minute before the parade. There were a several instances of someone trying to move up a line to rejoin their party (presumably) but I'm ok with that if they're civil. WDW was just much worse. I tend to let rude, pushy, and overly loud people ahead of me, which I hate because it rewards the behavior- but the reality is one person isn't going to change them. The strollers seemed more lethal at DL though. I was nervous to go to DL after my WDW experience but I loved it so much more overall. Way more positive vibe and nicer crowds (likely because it was predominantly locals). We got shoved and kicked much less. Wish people could just respect each other- especially in a place like what those parks were intended to be. I just try to be as kind and patient as possible and practice breathing methods. The selfishness and complete disregard for everyone else some people exhibit truly baffles me though.