Just completed what I assume is the intro in about an hour (intro credits came up).
I wanted to chime in on Arne's comments and give my perspective on the intro. Is this the best Uncharted intro? Yes, easily and by far. UC2 is really the only competition and it really doesn't hold a candle to this one.
However, I think people are going to be pretty divided on whether or not the TLOU intro or this intro is better. I'm in the latter camp. I think this intro is paced better, lets the game breathe a bit more and slowly eases you into the tone and pacing of the game. What the TLOU intro has over this one and what I assume most will immediately compare it to is the emotional punch (which for me, really is the core of the intro). While UC4 gets pretty emotional, there's nothing quite like TLOU's gut punch.
tl;dr I think it's the best intro, though I could see why others would prefer TLOU's.
Edit: Another reason I really liked the intro was because it really just made me forget that this is Sam's first game. Like, wow.