People were mentally comparing it to how the calendar works ("drag and drop") as opposed to the home screen ("hold to enter edit mode so icons wiggle in fear, then drag and drop"). In part this is because we intuitively assume that the only thing we should be able to do with such icons is either click once to select, or hold to drag and drop. It doesn't occur to us that hold might do something else, as in the home screen's swipe, for instance. This makes even less sense when you realize a calendar has many reasons to enable dragging blank space to move around to new dates and times, while a schedule of alarms auto-repeats every 7 days and has no need for horizontal scrolling as a result. It was simply rushed for iPad. Neat idea, needs more work. :)