True, we're pinging google.com (which resolves to its local sites) over the active data connection - whatever flavour of Wi-Fi or 3G. We could have also broken this down by 3G types e.g. UMTS vs HSPA etc. The idea is not to show the theoretical maximum of LTE or Wi-Fi, if we wanted to that we'd just use a dozen phones in lab conditions. Rather, we wanted to get a feel for the changes in user experience of the mobile web, so this data is drawn from a set of 9m speed tests run with the OpenSignal app.