Letting It Breathe

[MontereyRick]

I didn't mean to infer that opening a bottle and letting it breathe for a period of time would provide the qualities of aging.

I was just wondering if you experts brought a nice bottle of Cab to a restaurant (or another place where decanting wasn't an immediate option); I brought a 96 Grgich Hills Cab.... how long would that bottle need to breathe in order to get the most out of it that night? We poured a glass for both of us and waited about 20 minutes (because I couldn't keep my hands off of it any longer) While the first sip was good, it seemed to get better for the duration of the meal... what do you guys consider the ideal time? 15minutes? 30minutes? 1 hour?