Nice analysis, UncleJJ. I agree wholeheartedly that the main point of the early SE is the great people, not the extra beakers from representation specialists.
I've played a few strong SE games on vanilla civ now at Monarch (one using Obsolete's wonderspam strategy), and in both I've missed getting the Pyramids. In both I've also been able to get the GL/NE combination, which strikes me as much more important than the 'mids -- it's +16 scientist GPP/turn in a single city (12 for sci specialists, 4 for GL). Assuming you can afford to run the 2 library scientists, too, that's 28 scientist GPP, and a total of 30 GPP/turn (the 2 artist points from NE pollution). Once this is running, you're talking 1000 GPP in 34 turns, so you'll get 4 Great People, with 83% scientist odds each, in a maximum of 34 turns. That's pretty huge if you ask me, and the ~6000 beakers they get from bulbing, or +27 beakers per turn if you academy-settle-settle-settle in GL city are massive over the course of the game (as they get transformed to +40 with representation, and then +67 with Oxford).
So, my answer is: try and nab GL+NE if you miss the 'mids and you look to have a SE map, or your leader is Philosphical -- it's a strong play.