That was my immediate thought upon reading.
A little more accuracy in the description would be helpful.
This should be presented as: "If this aggregated data reflected a constant across time, then we can see where language usage would end up in the 'long run distribution'."
But the jump matrix shown here will change with time. Most likely, if search results could be binned up by time period, the time dependence of the distribution represented by the eigenvector(s) would be somewhat interesting to watch, even if not remotely predictive. Could animate that or contour plot it.... exercise for the author... :)