That's one fight though, how many hugely advertised fights haven't made it past the first round?
Really, not that many. Some ended fast, like the TUF finales, Lidell-Jackson and pretty much all of Anderson Silva's fights. Otherwise a lot of stuff has gone multiple rounds. Lidell-Silva, Couture-Lesnar, Mir-Nog, Pulver-Penn, Sherk-Penn, Neer-Diaz, Jackson-Griffin, Rua-Griffin, Hughes-GSP 1, 2, & 3, Hughes-Penn 1 & 2.