Re: choking up to make contact...
I still see a majority of players catching the ball with two hands. It surely makes getting the ball out of your glove much faster and eliminates "a necessary movement" after the catch which saves precious seconds on the throw. There are times when you can't and shouldn't use two hands as you cannot get to the ball for the catch. I don't think you will find many coaches who discourage using two hands when it is possible, particularly on plays that involve a throw after a catch. Matter of fact, I can't think of a time that I have ever heard that in all my years involved in the game.
As far as choking up goes, I think it gives a player better bat control, but a lot of guys today have abandoned that principal. Just my opinion.
What's truly amusing is all of the definitive and absolute statements that are made in this thread with little to no evidence for support.
Talent is God Given: be humble.
Fame is man given: be thankful.
Conceit is self given: be careful.