As a pedestrian, if it is my turn, I can walk. They *will* yield.
In Seattle, especially in the downtown/Belltown area in my experience, this is becoming less of a safe assumption. When I worked in Belltown, it was a rare day that I wasn't nearly hit by an impatient driver; now, working closer into the downtown core, the near-collisions are somewhat less but still far too frequent for comfort.
I do tend to assert my right of way where the vehicle's speed is not likely to do serious harm, because I'm not ready to give up safe pedestrian right of way that I've become accustomed to. But there are also times I have to actively dodge an oncoming vehicle to ensure my safety.