Very few undeveloped domains have meaningful traffic.
The only people who care about the trickle of traffic that undeveloped domains have are those who play the parking game. They are looking for typeins and residual traffic on previously developed domains, hoping to scrape enough out of them to cover portfolio renewal fees and have leftover profit.
If you have a video site domain that gets 10 hits a day, some domainers will label that "Has great traffic!". But that is nothing to the end user who wants the domain for a project where the traffic needs to go into the tens of thousands a day to call it a success. The only thing he is considering is the name's brand value and pretty much nothing else.
It doesn't matter if the domain gets 1 hit a day or 100 hits. 1 Million Google results for the keywords aren't worth anything extra. He isn't paying for high Google monthly search rates either. Nor is $8 PPC going to sway him. This is all domainer BS that works only with other domainers.
Again, branding value. That is where it's at.