There are definitely several lines which suggests that Galactica is older than most of the fleet. I recall one line where they say something about how everythin

There are definitely several lines which suggests that Galactica is older than most of the fleet. I recall one line where they say something about how everything is hardwired, and there's no central computer, or something. Something about how it was built during the Cylon wars, which was different than the newer ships which were built after Cylons weren't a threat so they relied on more centralized computer systems. You can both be right.