#3
are you talking gage or brand ? most new guitars come standard with .09 gage as for the brand your guess is as good as mine check the web site maybe.
Im gonna pistol whip the next guy that says shenanigans !!!!
#6
if i rememeber correctly 90% of them come with .09's, and they're PRS's own strings made for them by D'addario if i remember right.