In preseason game 1, to win the game, with no timeouts and the clock running, he got on the field, got set, and drilled a 31-yarder.
Yes it was short, and yes it was preseason, but that's about as good of an indicator as you can get for a rookie in preseason, and the kid looked poised.
What about during the regular season when there's 5 seconds or less and it's 50+ yds. at the end of the game for the win and there's more pressure, can he do it. We already know that Lutz has done it quite a few times.