So, you'd feel more comfortable if the company threw in some rhetoric about morals and freedom that are, as assertions, impossible to verify, but would make people feel more warm and fuzzy?
So, basically, what politicians put into their speeches?
Read over your statement again. There's very little of substance in there. For example, what does "this" in "We would never do 'this'" mean? And I'm not being pedantic, because exact language is important here. The question is, what could a non-PRISM-supporting Google say that would differ from what we see in the OP?
And this: It goes against everything we personally believe in and stand for.
OK...let's assume "It" has been properly defined. This hyperbole would be a lie, because....everything? Again, impossible.
"Even if we were legally required to cooperate, we would resist and suffer incarceration if necessary."
OK...cooperate in what? The statement you've proposed leaves room for other kinds of cooperation, if not technically the kind being alleged right now. So this statement doesn't resolve anything.
"We believe in freedom more strongly than we fear the consequences of not cooperating with an oppressive government"
OK, same objections as before. But -- and again, I'm referring to an alternate reality in which Google is standing up against the NSA and PRISM, which may or may not be the reality we are actually living -- if Page is telling the truth about knowing what PRISM stands for before yesterday, then the statement you've proposed is impossible for him to assert, because we still don't know everything about PRISM...and so how would Page know if PRISM is the act of an oppressive government? He literally would not know because PRISM was unknown to him until yesterday.
And if you're saying, well, he should just know, because obviously Google is taking part in the program...well, that's begging the question.
And if you're saying, well, he should just be able to make that statement because any reasonable person, upon reading the reports yesterday, would conclude that PRISM is the act of an oppressive government. OK, that's fine, but that's still not really an assertion of fact, it's just rhetoric.