I had an interesting conversation while waiting for Robert Murray's presentation on the construction outlook. A senior associate from one of the leading architectural firms pointed out that the concept of integrating sustainable design into a plan has, until now, been initiated largely by the designer/architect. One client of theirs, a box store, required a payback of three years or less, and that's what's held them back. Tough, I would imagine. But he sees the trend quickly changing to demand-driven. In other words, retailers and property owners of commercial properties are seeing the advantages to sustainable design. I'm interested in what others have to say...