It was an ambush tactic -- he introduced a complete lie among his talking points, and dared everyone else to refute it. The next time around, anti-SOPA spokespersons will fire back on this point "with chapter and verse". Considering we're still quite far from the decisive votes, seeing the pro-SOPA camp already forced to resort to outright lies is comforting, they clearly have nothing else to show.
But HOW is his talking point a "complete lie"? It is amazing to me that nobody either on that interview or in this comment thread can clearly and succinctly point out how the NBC exec was lying.
I think you misunderstood this. Let me rephrase the above definition to make it easier to parse:
"A foreign infringing site is a FOREIGN SITE for which it is true that (1)... (2)... (3)..."
FOREIGN SITE is defined in section 101 as "an Internet site that is not a domestic Internet site".
DOMESTIC INTERNET SITE = "an Internet site for which the corresponding domain name or, if there is no domain name, the corresponding Internet Protocol address, is a domestic domain name or domestic Internet Protocol address". It is open to interpretation whether a site with a US and non-US domain is a domestic site.