<p>I think if the parent is paying for most of the undergrad education–as we are–we have every right to ‘encourage’ our children not to dilly-dally. Changing majors is a potential problem, but had either of my D’s done that, I would have understood an extra semester or two because of that. Also, for science prerequisites, sometimes to keep the GPA up it is necessary to either drop or retake a class or two, which conceivably adds time as well.</p>