Chronologically yes. However technologically they advanced around the same rate. If they did not have to travel so far before they settled down they things could have been much different. Such as the Native Americans discovering the old world. Imagine if say the Europeans had to travel as far as the Native Americans did from Asia to North America. They would have been just as disadvantaged technologically.
And its not just the Native Americans that go held up, the Polynesians and their decedents got held up too since it takes a long time to colonize spare islands in the world's largest ocean.
Then there is the cultural influence, such as nomadic cultures not wanting to settle down or cultures in hard places to develop such as the rainforests or deserts. And some just are more conservative in staying with the old ways such as the Amish.
I would not want any of the new types of terrain or terrain features removed. They are too incorporated now. I could see the vanilla terrains using the old vanilla textures (except for the desert) but I am not sure that would help.
As for Palms, Bamboo, Coconut, etc I have no idea how you make them more low graphics friendly.
I hate to sound harsh, but C2C is not made for low end PCs. I mean its a HUGE mod, if they want one that a low end PC they should try RoM/AND or Vanilla BTS. There is a reason we don't have a "C2C Lite".
That's not to say we cannot try to make things more efferent, but not as the cost of taking out awesome features. That's what Afforess did with AND and I don't want to go down that road.