No not technically from experience.
But I have read many articles which basically involve what I have said.
If you can think off more stuff to say thats GREAT! But try to make it short.
Don't over do it with a hour long speach, they'll think your just some loser lols.
Make it short with "Smart" words
One thing don't say "I Think" say "I Know" give them a reason to pick you over hundreds or thousands of applicants