It was a script, not a computer. The difference being with a script there is no intelligence required on any level beyond telling the computer, "OK, if you get a response like this, send THIS kind of message back." Furthermore they cheated because they told the judges the "boy" was a Ukranian kid learning English as a second language to explain away the odd responses. This has been done before with higher success rates. The guy who is behind this, Warwick, pulls this kind of media stunt every now and then, which mindless reporters repeat without a hint of fact checking. So yeah, we've got a few more years until Botnet.