Bear in mind that you dont need to dump the entire bottle to chill it down.
If whilst dumping a bottle at a fill station you but the bottle under the vented gas, it will chill the bottle quicker.
Once there is a frosted layer on the bottle stop dumpin, and start filling.
Another neat trick to know when a Anti-Syphoned bottle is full, is when filling the bottle, all of a sudden the frost on the outside of it will melt. Stop filling. the temperatures have equalised. and any more filling, will just put liquid into the bottle.
As for listening to a bottle. im not too comfortable with the idea of hold a potentially explosive item that close to my head.
If you grip the hose that fills the bottle, tightly, you can feel the gas moving through it. when you can no longer feel the movement, the pressures are equal, and you can close the fill tap.
anymore for any more?