I would have to ask how much ENT technology we saw on the NX class was home grown or developed from obsolete samples or whatever. Also from what we have seen Earth wasn't that much of presence in the galactic stage. Not much of a infrastructure. Then we compare the Klingons and the Romulans who have been out in space for a much longer period and what do they got?
We do not know the rate of the Federation's tech advancement except in speed. Keep in mind that the turbine engines of 1912 is basically the same as today. Hell hand guns haven't changed much either.




