They're going to be retrying it, according to my inside sources. (My friend from the MythBusters board Misha, who's going to be part of the experiment. He's a rocket scientist.)
My argument has always been historical documentation. As in, there isn't any. Now, with most historical figures of the time, this means precisely squat, given how fragmentary records from the time are, but everything else everyone claims Archimedes did was documented within his own lifetime; this isn't.
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"