One of the remaining gems within my reddit horizons is the /r/AskHistorians subreddit, which maintains an FAQ that (amongst many other things) contains a plethora of academic responses to GGS. I have included below a link to the top and presumably most comprehensive response [1] for those who are interested.

[1] https://www.reddit.com/r/AskHistorians/comments/2mkcc3/how_d...