I wouldn't say a lot but yes there are of course a few successful films that qualify as long, but I think we both agree that this is a special case. However, the average length of a feature film has decreased over the last decade or so.

On a relating note, it bothers me and perhaps it's just the sign of the times we live in that mostly everything now is expected to finish in a particular block of time. And when it doesn't or lasts longer there are words that get attached to the work. Why can't a Chris Marker short stand alongside a Bela Tarr film w/out any special labels?