Yes nothing worse then the captain coming on with "I have good news, and bad news" "Good news, we are 20 minutes early, bad news, our gate won't be open for another 20 minutes". This happens on those rare occasions that there are no delays into ORD, United, along with all other airlines build in 20-30 minutes in delays, especially during peak times into their schedules so they can show an on time arrival. When all goes well, they land early but have no where to go.