Ralph DeLeo was identified specifically as a Street Boss chosen by Acting Boss Allie Boy Persico according by the govt.
It's true that the press release (link below) labeled DeLeo as the "Street Boss." Though I'm not sure where you've seen Allie Boy still labeled "Acting Boss." By the very definition of the term, it would be impossible for him to operate in that role since he's been behind bars. Which as been for some time now.
http://www.fbi.gov/boston/press-releases/2009/bs121709.htmAnd let me add that the labeling of DeLeo as either Acting Boss or Street Boss is one of the few times I've taken issue with the feds. Simply because, while he attended high-level meetings, making ceremonies, among other things; the fact that he was based up in Boston doesn't seem to make it possible that he would be able to run the Colombo family in New York directly on a day to day basis.
