My non-reader friend's various reactions...
After seeing Rodrick: "Hahahaha, his beard his ridiculously awesome."
After the first Viserys/Dany scene: "The fuck is wrong with that guy?!"
I had to explain a little about Robert's rebellion, who he killed every night in his dreams, and who was buried in the crypt that Robert missed. I think that the rebellion as a whole should've been discussed a little more, maybe they'll do this in the next couple of episodes but I remember that even when I was reading, I didn't fully grasp what it was all about until my second read-through of the series.
He thought the dry-humping Dothraki were a little stupid.
His first reaction to Bran's fall was "Oh I bet the wolf died to save him!" I just laughed at that and told him to keep watching.
He got the Lannisters and Targaryens mixed up once but I corrected him.
Overall, he's interested to see what happens next and is gonna watch episode two with me. Success, I'd say!