this came up not too long ago: would people mind posting their college lsat mean, as reported by lsac? it sounds like something schools take into account when they judge your ug, and it's hard to gauge what's typical.
i'll start-- dartmouth avgs 163 apparently. 53% of undergrads score in the 90th percentile and up; 34% in the 95th and up.
you went to school with some total smarties! mine is 152.
as for PBK being strictly GPA, that may well be the case at other schools, but i guess the UC's (or at least UCI, but i would imagine it to be a uniform policy across all UC campuses) don't think that's enough. you have to have good character and have taken "rigorous" courses in the liberal arts and the sciences, if i remember correctly from the link i posted. that's funny, because i took exactly one science class at UCI. AP credit + JC class + UCI class = i met my breadth requirement.