File this in the I-Don't-Know-How-Much-This-Matters bucket.
Realtor.com keeps track of property searches on its site, and then produces some monthly statistics.
For Washington cities, this is the list of the three most-searched metros for August, followed by rank across the U.S.:
Seattle-Bellevue-Everett, WA #55
Portland-Vancouver, OR-WA #130
You like more stats on housing? Go here.