Christ.
I thought by linking to another post we could avoid bringing out the chalkboard and pontificating on the virtues of the argument "The Switch Vs. Router conundrum."
Guess that wasn't going to happen, eh?
If it was a quick and dirty answer one was looking for I would imagine a quick search on Google would net the simple answer one was looking for. However, since we are simplifying the response let me give it a try....
Switch good, Router better.
4 words. "So simple, even a caveman could understand."