I don't even know if I'd go that far. I use "we" a lot in my comments if I need to refer to a person. "We" or "us" unless I know for a fact only I will look at the code. If I am working on an Open Source project, code I know I will share/open source or code at work, I always use the plural. Bitcoin is open source, so very likely "we" just means anyone who wants to take an active role in the code for the project.