I have discovered a key difference between information architects and librarians: information architects write books that you can find at a bookstore; librarians write books that you can only find (at best!) at the ALA store twice a year, assuming you attend ALA meetings.
There is meaning behind this statement beyond book distribution. It has to do with the insularity of the library world and our tendency to only speak to each other. It also reveals an underlying assumption that what we know and what we think isn't of interest to anyone outside of our profession. At least, I hope that's the reason, because another possibility, which would be even worse, would be that we don't think that anyone outside the library world is worth speaking to. That would be truly tragic.