My own research. I'll compile and publish it.

And yes, I'm _very_ aware of these papers. I used the same methodology as they did :) Note the timestamp on them, they are from the time when Seattle was booming.

And I even specifically looked at the Fourth Avenue that they used as a control because it also got a protected bike lane.

I have _not_ yet checked this hypothesis thoroughly, but from a cursory look at the data, the increase in business can be explained by highly-paid professionals moving into dense housing nearby (we can see that by looking at real estate prices and historical apartment rent data) and by tourists from cruise ships. It's further corroborated by the fact that the percentage of bike commutes did not increase significantly enough.