The hydrometer reading is the only thing that matters. If BrosBrew had airlock bubbles after a week of inactivity, but the hydro didn't change, then no fermentation took place.
airlocks bubble, or don't bubble, for a variety of reasons. It could be fermentation, or not.
trust thy hydrometer.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10