Seattle has been growing a lot in the past decade or two. I don't think we can conclude the population in the early 2000s is the same class of people that are there now.
From what I recall mainstream media claimed that many were anarchists from all over the country --most not local. We could look at arrest records from those protests.
Often media make similar claims about the current bands or people who self identify as anarchists and progressive --but ideologically they align more with neoliberalist ideas about free trade of goods, labor etc --with a Marxist bent this time (although I don't think that's been well thought out, given the implications)
Seattle has been growing a lot in the past decade or two. I don't think we can conclude the population in the early 2000s is the same class of people that are there now.