FWIW I've lived in Seattle for the past 13 years and I typically commute by bicycle a few times per week in the spring/summer from North Seattle into downtown. I've never had anything like that happen to me.

I have however dealt with a lot of oblivious drivers nearly running me off the road.

The new dedicated bike lanes with the reflective pylons are helping (especially the two-way barrier-protected bike lane on 2nd Ave of downtown), but there's still a lot more to improve.