The second age of open-air preaching?

We have been seeing a lot of energy behind renewed emphasis on open-air preaching as of late. For some (like the church I attended in Portland) this means holding services in a park for others this means the work of evangelism in the public square. When we think of open-air preachers what usually comes to mind is not compassionate, reasoned people but I think the tide is changing. Have you encountered healthy and winsome open-air preaching in your context? SHould you be the one to bring it?