Yes, the article had a typo in it (I quoted the article verbatim other than the [SIC] that I added). The correct belief of young-earth creationists is 6,000 years, not 600. For the record I don't think that impacts my point at all.

For the curious, that number is largely arrived at by working backward through time using the reported ages of the Old Testament prophets going back to Adam in the book of Genesis.