Have to disagree with you on this one. While I don't know much of the adcom of the school I am going to, the school I did my PhD in has left me very familiar with their process. Your point of a lot of non science majors making it into medical school is irrelevent.
Look at what I was saying, he asked if the gpa was looked upon equally, not if non science has an equal/better chance of getting in. Sorry, its not, and I'd bet I have a bit more experience with that process than you, though I may be mistaken I doubt that your law school experience gave you the same insights (...unzip pants, pull out tape measure and measure...just kidding
). While there are differences in different sciences, the committees absolutely will not look at say a physics 3.6 compaired to a history 3.6 in the same light. Both are a bit unique (as you mentioned bio majors...please show me where I spoke of those) and will have that to their advantage, but only the physics major can pull the 'I was in a very difficult major' card as an explaination for his low gpa.
Also, side note of some relevence: most committees will like to see more than just min science prereqs if you are a non science major. And Law2doc, if yours didn't I'd argue your situation was unique.