i did an away rotation at long island jewish hospital in NY. most (if not all) the residents there were wearing scrubs, even the ones not doing procedures. i hate 3rd year attire. can't wait to trade my neatly pressed pants and ties in for scrubs and crocs.
Yes, there are many programs now that allow residents to wear scrubs. For years, many doctors here in Texas have been wearing clothing like Dr. Cox wears in the television show Scrubs, colored t-shirt, cargo pants and athletic shoes.