Depends on how your priming Danielski, and what YOU want to dobut when kegging in a corni which one is it?

As a rule of thumb maturing your beer will produce a better flavoured ale.
If your priming with sugar in the corny then you have to leave it for, say 4 weeks, for the beer to carbonate.
If your force priming, like I do, I can carbonate a corny in less than a week.
I'm quite impatient so I usually tap at between 4-7days.
That's why I moved to bigger brew lengths, so hopefully I can brew more than I consume so my beer can mature for longer

I have tried bottle matured samples of my quickly tapped corny's and there is a difference. Beers can develope totally different tastes when they are allowed to mature.
Harsh tastes usually mellow, tastes not present initially can develope when maturing and other tastes can dissapear altogether

Try priming some with sugar and force priming others, maturing v not maturing and make your own mind up

Hope some of that helps
