Meme Speed

My casual copying of a meme seems to of spread. I don't know if everyone on my friends list saw it on mine first or its just one of those things that goes in cycles. As far as I can tell the meme originated on the 27th September 2005. If I hadn't of had a few ales this evening I'd almost be tempted to do some data mining to figure out how fast it propagates. Or maybe I'm only thinking that will be interesting because I've had a few ales?