As for the most advanced version of those people, their glowing white outfits reminded me a lot of the Ship of Lights and Apollo's white uniform in the original BSG.
Agreed, though I was initially leaning more toward the Kryptonians from Superman: The Movie, especially after being slapped in the face (delightedly, mind you

) with what sounded amazingly like a sample from one of John Williams's compositions for that film: Specifically, the haunting bit usually reserved for the green crystal Jor-El sent to Earth with baby Supes, which eventually built the Fortress of Solitude all by itself. It can be heard a few times shortly after Kelly first takes notice of the primitive village from that hilltop. I've only watched the episode one time, so without analyzing it further I'm not sure if the music was a near 4-note quote of Williams's 5-note motif for the crystal, or just highly reminiscent, but Krypton was on the brain the instant I heard it. Thus, the evolved aliens' appearance didn't surprise me a smidgen.
Of course, I've long connected the two separate alien cultures of "Krypton" and "Ship of Lights" in my mind, since I've never doubted the obvious influence Donner's film must have had on BSG's interpretation of the Light Beings' and their superior technology, as presented. Also, as distinct as they are, the religious parallels of those two story-lines are both unmistakeable and intentional.
Likewise, the eventual attitude of the "7/11" planet's advanced inhabitants seemed just as enlightened as the perspectives of both Adama and Jor-El, in regards to the dangers of misinterpreting things and events when one is simply ignorant of the actual circumstances at hand (much less "the bigger picture").
Given the way these guys really know how to tug our multiple fan-strings... Coincidence?
