it only took us 58 years to go from the first plane to putting someone in orbit. honestly things seem like they progress just fine.
We were supposed to have bases on Moon by Eightieth, according to predictions from Sixties, yet it's 2016 and Moon Bases are no yet in sight till 2050. And according to your logic Fallen Empires should be invincible because they have been living in space for eons. Yet they loose to Empire with ~100-200 years in space.
Leaving tightness of multiplayer games aside, tech research speed, Pop grow speed, colony building - everything feels too fast. What about uplifting species - it would be done in like, 10 years (if it's done slower it won't be worth the cost)? What about dangerous tech - we research, f.e, Sentient AI and in 25 years it rebel across the galaxy?