I thought I heard today that they wrote it themselves:')
Well - if they did write it then I'm somewhat impressed.
We get so used to watching everything just perfect on the tube. Newscasters that make millions 'cuz they speak flawlessly. Politicians who are in government to a large degree on the ability of their speechwriters to bring their message out in a clear manner with just the right humor, patriotism, etc. - and the politician's ability to deliver a decent speech. Actors who do this for a living.
A couple of 23 year olds giving a televised speech for the first time (especially if it was written by them) they did okay.