This point has come up several times already and will continue to as new people buy the game and are baffled by the "week" long turns.
You are right, at least in the sense of civilization growth, etc. The view on this seems to come down to whether people are "movie" sci-fi buffs or more "book" sci-fi buffs who are looking at it more realistically and historically. The "book" types are looking at it more like the era of the historical european colonization period, rather than the battlestar galactica episode of the week.
It is supposed to be moddable, and I or someone else who cares will have to do a mod for it. If only so our friends who we show the game to will stop laughing at it right away when they see things like "ion drive takes 4 weeks to develop" when we finally just launched our first ion drive ship 2 years ago, after working on the idea since world war 2.