I may be in the minority, but, at the level I play (not very good:thmbup: ) I do keep my disc selection "close to the vest" especially if the match is close and 1 shot can affect the outcome. I don't do this to be mean, I do it to gain any small advantage I can. We don't play for trophy's or money, just bragging rights, so winning is important amongst all of my friends.
An example of this is if I do not have the box, I will not pull out my disc until it's time for me to shoot. Or, if I am asked what I am throwing on a particular shot, I will answer with multiple disc options and not verbally commit to just one disc.
I'm sure if I was at the pro level it would not matter, those guys/gals are probably just focused on their game and could care less what disc someone else uses.
A disclaimer: I do NOT do this on casual rounds. Only when me and my friend/friends know that the match is "ON" and bragging rights are stake. During casual rounds I love talking strategy, shot options, disc options, and do anything I can to help my friends out....because, they are me friends
.