idunno,
re: "... if you're referring to belief in God as a choice I'd say that may not be the case initially."
I’m referring to beliefs in general.
re: "I was asking what what the ‘number of folks’ chose to believe..."
Some comments that I’ve seen are:
"While one can choose to believe whichever side of the argument he or she likes best..."
"...in this case I choose to believe in the FDA approved technoogy..."
"I choose to believe God wants all of us to be happy."
"I choose to believe that Harry's got some great news to deliver regarding the joint deal between..."
"I choose to believe that God is still in control of this universe..."
"I choose to believe the other one (Kirsten Storms) wouldn't have played it like that..."
"...and I choose to believe the engineers."
"I choose to believe the facts as opposed to the capitalized ,third person, self..."
"I choose to believe the second based on zero evidence."
"Until then, I choose to believe this publication is good news."
"I choose to believe they are on the verge of success. Only time will tell."
"I don't have to prove to you or anyone else what I choose to believe."
"I choose to believe Norfolk Southern, If you choose to believe John Petersen, that is your choice..."
re: "... and if they chose to believe after or before evaluating some argument?"
I have no idea.
Is there any particular reason for asking? I don’t see why you need this information before you can demonstrate your ability (if you have it) to consciously CHOOSE to believe things.