Uh, first off. How bout comparing 80 years to 80 years or 40 years to 40 years?
What's this, "Let's compare 80 years to 40 years and say less has been accomplished in the 40."?
Secondly, way to pick an unarbitrary starting point for the 80 years at approximately the beginning of a major technological revolution and then use the current comparison time frame at a non-precursor to a major technological revolution, but rather a maturation period in the previous technology. Ever heard of incubation period?
If you want to be unbiased please compare 1860-1909 to 1960-2009. Or better yet, 1880-1960 to 1980-2060. You're going to have to wait another 50 years, but I am very eager to see your comparisons of those two timeframes with regards to rate of technological progress.