No letters yet here at Univ. of Alberta (Edmonton), but yesterday the faculty of grad studies released the results to the individual departments. Our department then almost immediately sent out a mass email congratulating the new awardees. Importantly, they released both postgraduate and postdoctoral results, even though postdocs don't apply through any particular university - seems to me like each University receives a master awards list with all PGS/CGS/PDF results. In short, your University may have the PDF results as well - mine did. Got my PDF, phew!