To paraphrase a famous letter, Yes, Virginia, they do exist! I checked my mailbox at the post office today and lo and behold some time within the last week the sticker fairy dropped off an envelope. It appears that it was postmarked on the 15th (near as I can tell - the cancellation stamp is very blurry), which was one day shy of the one week mark of my request. I received 18 stickers in total. Sorry for the poor resolution - my phone's camera was set lower than I thought it was.
Column-wise, I received:
2x Boardwalk Empire Premiere (Two of them?)
Mad Men Superfan
Sterling Cooper Draper Pryce
TWiT TV Fan
This Week In Tech
HBO Insult Artist
Super Gluer (How I got sent this one is beyond me - I know I haven't been awarded the sticker.)
as well as a little card noting that they send what they have in stock.
Thanks to GetGlue for sending these out! One more week and I can request again!