Black Sheep,
I hear what you are saying and I should not have backed down so easily. However, I believe if I had of pressed him for proof, all he would've done was continue to cite WT literature. He gave me a printout of kc chapter 14, well 5 pages of it, in the chapter called "The King Reigns!" He also gave me an appendix to this chapter that addresses the issue between 586/7 BCE and 607 BCE. I've read it and it seems to suggest that secular historians are NOT taking the Bible into account and using it as supreme authority.
Now, the appendix tries to suggest that the secular timelines are 'subject to change' and states that "Christians who believe the Bible have time and again found its words stand the test of much criticism and have been proved accurate and reliable." While Christians who believe the Bible would certainly agree with that quote, one thing that has always been 'subject to change' are the man made interpretations of the Bible. This is especially true within the WTS for it is my understanding that 1914 had an entirely different meaning to the Russelites in 1919 than it does to the JW's today.
Frankly, I've become rather intrigued with this whole subject of study so I will continue to see what I can dig up.