No I believe cast iron pipes are a great deal more in cost than PVC. I haven't seen cast iron used in residential, single family dwellings in this part of the country in many years (actually I have never seen it used in a new house but I'm not that old). I *think* it went out with the plaster walls. However, it is definately used in some commercial work.

Things are difinately not built here to last a thousand years like in the UK.