Note that I upgraded my weapon before the Nazgrim parse last night. The ones with even Agony ticks, or where this week's were higher than last week's, included over 2k more spell power from that upgraded weapon.
I will agree that this isn't enough parses to be statistically significant. Part of the reason for my post was to add logs that could be analyzed along with others, so there could be enough parses for it to be statistically significant.