If its pure oxygen being used, you only need a slow release and 60 seconds tops.
if you're using an aquarium pump, its not pure oxygen, and that's where 10 minutes of aeration comes into play.
pure O2 is very fast.
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