Whether most of the notes in the auction found buyers or not, it actually has nothing to do (or very very little to do) with those notes being graded by PMG and PCGS. It is not a big secret that most items on the block by this auctioneer have hidden reserves equal to the lower estimate. I will not elaborate further, but it is safe to say that the results of this auction should not be interpreted as having any great significance, no matter what sort of angle you want to take.
The same auctioneer holds monthly (or nearly monthly) auctions on icollector.com. To see if a particular note in the Torex Sale sold, check to see if it is listed in the next online auction. If it is, nobody bought it.