I caught most of Rubio's speech and while sound bites like these were good, spot-on and accurate, my impression was of him he was uncharacteristically nervous.
Delivery wasn't as sharp as it normally is. Tempo and rhythm were a little off -- sometimes the high points sounded a little forced.
These are tiny, tiny points and while I see Rubio as being a outstanding conservative who will go a long way in the party, maybe he was just a little off his feed last night.