I was responding to this: In 1963 a decent suit cost around $35.00, same as an ounce of gold. Today a decent suit costs around 500 bucks, just about the same as an ounce of gold. Therefore in around 40 years gold has neither gained nor lost any purchasing power. That's what I meant by 'worth'.
Now, if you agree that this anecdote is true, and gold has kept the same value for the last 40 years, it shouldn't matter what you compare gold to or what time frame you consider. If you think an anecdote comparing gold to a single consumer product 40 years ago is a silly "fact" on which to base such a broad assertion, join the club.
That's exactly the point. Gold maintains its purchasing power over time. Fiat currencies do not.