Acephalous is trying to measure meme speeds, but we are theorists, dammit, a model prediction is needed!
So what is the asymptotic speed of a free small meme in the wild web?
1, of course.
In natural units.
The derivation is left as a trivial exercise for the reader.
The efforts done using facebook newsfeeds are a worthwhile point of comparison. The growth of a particular example group was shown to be logistic, though I forget the exact specifics of aforesaid curve. Pretty straightforward, since it was a distributed sort of buildup.