When it comes to bittering hops, how much of a difference is there between the final outcome? Do you still get a noticeable amount flavor/aroma from bittering hops? I understand alpha acid and all that stuff, I am just wondering how different a beer would taste if you substituted Chinook bittering hops for Columbus... or something of that nature.
Right now I am just under the impression that you only get bitterness from a hop that you boil for 60 minutes. Correct me if I am wrong?