Had something similar at the Apple Store as well the other day. I had the wifi turned off on my laptop while waiting, and when the genius came over and turned

Had something similar at the Apple Store as well the other day. I had the wifi turned off on my laptop while waiting, and when the genius came over and turned it on, it wouldn't connect. After about a minute we came to the fact that I used (google|cloudfare)'s DNS (apparently Apple's wifi doesn't like that), which was enough of a signal that we likewise skipped a few steps.