I am not a scholar of such things, but a quick glance at the documents I am familiar with suggests that the date ranges represent uncertainty within the compiler’s point of view. That’s reasonable, but when it’s linked out of context it’s not immediately obvious that it doesn’t reflect the range of debate in the broader secular scholarship, let alone secular and conservative religious scholarship taken together. So caveat lector.
That said, the breadth of documents linked here is really impressive.