When I came upon this post in the Raids and Dungeons forum, I had to laugh. The guild Dissension on Bleeding Hollow apparently got three Rejuvenating Gems -- each about a 5 percent drop off the three drakes in Blackwing Lair -- on one run. The funny thing is, the exact same thing happened to my guild this summer before we could even clear BWL. One of our healers thought it was funny and told a real-life friend of his, who happened to be in another raiding guild on our server. That guild would not talk to us for several days, aside from random "I HATE YOU SO MUCH" tells from their druids, priests and shamans. The same thing happened later in the summer, when we killed Nef and got three Ashkandis out of our first four kills.
I did the math on the Rejuv Gem drops and it came out to be about a one in six thousand, five hundred chance occurrence. (Please correct me if I'm wrong -- it's been a long time since I've been in a statistics class.) End of Days on Black Dragonflight reported an even more improbable loot table: four Talismans of Ephemeral Power off the four Molten Core bosses who drop them. This has a chance of happening in one out of every seven hundred and fifty thousand and change Molten Core clears.
Have you ever had a wildly improbable run of loot luck? And not an improbable run of not getting loot -- sorry, there's going to be a lot of guilds out there still waiting for that last Wraith Blade or Bloodfang Chest. People who complain about "it must be our loot seed, we've never seen a Eye of Sulfuras" need to look up the phrase "random" in a dictionary, along with "two percent drop rate."