Certainly the impact of Tech can be felt in Seattle. On the Eastside there is a dominant feeling of Microsoft-ness. The corporate culture ooooozes out in many ways. You will likely have microsofties in meetings for any group you are part of. There are a ton of Tech companies, Google, Facebook, Amazon, not to mention smaller home grown ones. If you look at the Geekwire 200 list, you can see all the various startups in tech. I am sure that If I were 25 and single that the impact of tens of thousands of new tech programmer types wandering around for a date would make a significant difference. What does a male engineer do when they can't find a date? Write an app of course!!! We have 15 dating apps that I have tripped over at Startup weekends and other mentoring efforts.
So you can find coffee shops where there is very little hint of Tech. On the other hand, there are corners where you would not expect it to pop up, and yet it is there. I think that the Bay area is far more impacted. Not a location at all that does not have tech impacts.
Housing prices are way way way less in Seattle than in the Bay Area, but they are raising at 10%-15% a year, so I am sure that is part of the Tech Impact.