Presocratics, Sophists, and Postmodernism

What do you see as a potential link between postmodernists and the ideas from Heraclitus, Protagoras, and Gorgias? Is there a connection? If so, what is it? If you think that such a connection is unsound--why so? How are the sophists and postmodernists similar? How are they different?

It has been argued that postmodernism is merely a rehash of ancient Greek sophistry and Greek Gnosticism. Do you agree or disagree? Why? Please give me (this class) your response and your ideas for why you think such.