Just for my own curiosity. I was wondering where you found the earlier printing of the quote that lead back to such an early date. The earliest I can find for it is 2010 and in a long writing that reads like it was written a number of years after the fact.
I've got a collector's edition of the Dark Elf trilogy published in 1998. As an extra for this edition it included an introduction from Ed Greenwood and a new foreword from RA Salvatore explaining where the idea for Drizzt came from.