I think something that needs to be recognized in this discussion is that none of this "history" was written in order. So if the later material seems to put Cochrane in the back seat, that's a problem with the later material. TOS said he was The Guy. Fan material, the Spaceflight Chronology, and everything else (canon or otherwise) said he was The Guy. Even TNG said it.
There are folks that know post-TNG Trek way better than I do, but when was it first stated that Vulcans had warp-drive before Earth? Back in the day it was assumed that their exploratory ships were sublight and the Ears were just really long lived. Even First Contact is arguably vague on this point. Troi states that humans have discovered warp drive (or faster than light, I don't recall which.) Not that they have ALSO discovered it. I would think that if you just took forty years puttering around the local star systems and you saw something go FTL, it would get your attention.
As for the "Earth-centric" argument: First off, in Metamorphosis Spock is IMPRESSED. Cochrane is a big deal. Spock has no trouble in any other episode deflating Earth's opinion of itself. So why is it a big deal here? He doesn't say EARTH'S discoverer of the space warp (not warp drive, btw). He say's THE discoverer of the space warp.
Also, IIRC, even Picard (in TNG, not First Contact) thinks Cochrane is a big deal, and again refers to Cochrane's flight as first. (Someone's going to have to fill in the blanks here. I don't even know the episode name. The one where they try to create a sustainable warp without a ship? You guys know what I'm talking about, right?) If warp drive wasn't a human achievment, Picard would be the first to point it out.
Obviously the Old Ones and the like had their own advanced tech. Yes, the Borg's warp travel had nothing to do with ZC. But from the POV of the Federation and it's immediate neighbors Cochrane was it. At least until 1996 or so.
There are folks that know post-TNG Trek way better than I do, but when was it first stated that Vulcans had warp-drive before Earth? Back in the day it was assumed that their exploratory ships were sublight and the Ears were just really long lived. Even First Contact is arguably vague on this point. Troi states that humans have discovered warp drive (or faster than light, I don't recall which.) Not that they have ALSO discovered it. I would think that if you just took forty years puttering around the local star systems and you saw something go FTL, it would get your attention.
As for the "Earth-centric" argument: First off, in Metamorphosis Spock is IMPRESSED. Cochrane is a big deal. Spock has no trouble in any other episode deflating Earth's opinion of itself. So why is it a big deal here? He doesn't say EARTH'S discoverer of the space warp (not warp drive, btw). He say's THE discoverer of the space warp.
Also, IIRC, even Picard (in TNG, not First Contact) thinks Cochrane is a big deal, and again refers to Cochrane's flight as first. (Someone's going to have to fill in the blanks here. I don't even know the episode name. The one where they try to create a sustainable warp without a ship? You guys know what I'm talking about, right?) If warp drive wasn't a human achievment, Picard would be the first to point it out.
Obviously the Old Ones and the like had their own advanced tech. Yes, the Borg's warp travel had nothing to do with ZC. But from the POV of the Federation and it's immediate neighbors Cochrane was it. At least until 1996 or so.