If I see someone waiting at a crosswalk and I have time to stop, I will stop and let them go 100% of the time. I'll even take the extra steps of hitting my hazard lights and blocking the middle of the lane so jackasses won't try to drive around, which has happened to me on multiple occasions.

People do make it really hard sometimes, though. Love it when someone is power walking down the sidewalk and then takes a quick 90 degree turn directly into the street with no warning and without looking.