we all live in different riding environments, with different conditions. For me (and others, I am sure), many of the stop signs I encounter can be accurately assessed as I am approaching them, with clear sight lines of sufficient distance to roll up, stop, and go, no long pause needed.
Don't automatically assume that every stop sign requires a foot down stop to determine safety conditions. Nor should any of us assume that every stop allows for a foot up stop&go. In unfamiliar territory, foot down is certainly safer. Practicing "pause-n-go" stops is something we all should be doing. Not because we want to use it all the time, but because that practice helps us attain better overall control of our bikes during slow speed riding.