Most of these leverage the native drag and drop primitive APIs, which are going to be slightly slower on any touch device.
There's a series of events that could be fired, depending on what the user is trying to do, and initiating a drag is lower than waiting to see if they are making a gesture or clicking / tapping something.
There's a series of events that could be fired, depending on what the user is trying to do, and initiating a drag is lower than waiting to see if they are making a gesture or clicking / tapping something.