https://uma.googleplex.com/p/chrome/histograms?endDate=latest&dayCount=7&histograms=InstantTethering.Performance.AdvertisementToConnectionDuration&fixupData=true&uniqueUsers=true&showMax=true&filters=platform%2Ceq%2CC%2Cchannel%2Cone_of%2C4%7C3%7C2%7C1%2Cisofficial%2Ceq%2CTrue&implicitFilters=isofficial

The bucket with the most metrics is the top bucket, which ranges from 10,000ms to 2,147,483,647ms. Because this bucket is so large that it spans 5 orders of magnitude, we do not have a clear idea of what is going on with the metric.

I believe Ryan originally chose 10s to be the maximum bucket because we have a 10s timeout. However, that timeout is the time between starting to advertise to a device and receiving a scan result from that same device. The metric, however, is logged after receiving a scan result *and* creating a GATT connection to the device, which means that real connections can often take >10s.