unionrdr, I absolutely agree with you as far as allowing the beer to mature goes, even with kegging. I just started to keg, in fact my last batch, a cream ale, was my first kegged batch. Being new to the process, I innocently figured, hey if I pressurize at say 20-25 psi, rock the keg back and forth and force it into the keg, then let it sit for a few days and bring down to serving pressure, it was good to go. Sure, the beer was well carbonated, bubbles throughout, good head with nice lacing, but the taste wasn't quite there--it was way too sweet and had an alcohol taste/kick as if I added vodka or something to it (which I did not). Over the next two weeks, I noticed a big change in the beer. Its now on its third week in the fridge, and its an amazing beer. The flavor mellowed and lost its overly sweet, sugary finish and the slight alcohol burn was gone.
I learned first hand that carbonated beer doesn't mean mature beer, and mine was far from mature after 3 days under carbonation. Even my dad, who is mostly a BMC drinker noticed the significant difference after it sat for two weeks. It was really the first time I've realized that I can make great beer, but I cannot rush the process, even by forcing CO2 into it.