I don't see how that has to be PR. Obama actually uses a Blackberry, Blackberry addiction is so common that there's a term for it (Crackbery) that even my dad would know, and their brand name has almost become a generic substitute for any smartphone with a keybad. Blackberry is the knew Kleenex or Xerox.

I don't think PG would suggest that every time you see a brand name its due to submarine PR.