New strollers push like a dream - my maclaren can push my 75lb kid with his 34lb sister in his lap with one hand and no sweat on me...Maybe some parents need stroller conditioning like kids need walking practice.
I don't see the need for the sassy reply on parenting - this is not a competition to see if you, your kid, your spouse, etc can handle a full day (open to close) at disney without getting tired or cranky. And - I do agree about parenting and planning - It IS about GOOD planning and taking reasonable steps to avoid those situations all together. All Good parents should do that. In my family - that means making sure that the younger kids can get around the park comfortably and at my husbands walking pace without anyone getting angry or frustrated about it - which for us, will mean a stroller to get to/from BLT to the parks, and from generally form land to land (or test track to soarin or Italy into the case of Epcot!). The bonus of having a place to store the ponchos, extra clothes, sunscreen, autographs, and water is nice too. (I always carry my bg camera so it's not stolen)