You would think so, but natural selection isn't the only force involved in evolution.
In fact, I think classic Darwinian thinking relys too heavily on this concept.
Mankind's rate of evolution has definately speed up.
We've taken a couple of million years to reach our current state, but the last three homonid species (of which we are the sole suvivor) developed in only a few tens of thousands.
Human populations remained quite low until the development of what we consider modern civilization.
Then our population explodes.
What's next?
The scary prospect that we control how we develop. Enhancing or altering or own genetic makeup, the adoption of cybernetic additions (wired humans, computer enhanced, tied physicaly to the web).
Look at how much our technology has improved in only the last few. hundred years.
Would our ancestors from 500 years ago recognize us.
Would we be able o comprehend mankind's state 500 years from now.

No, we evolve.

[ Edited by Jim 03.03.2013 - 22:58 ]