Even if you were correct in all your points, the increase in collaboration it facilitates is a big enough win to, at minimum, make Google Apps a worthwhile compliment to MS Office. I'm not sure whether you have direct experience with Google Apps in a large enterprise but your points read as if you don't; I'll withhold my comments until/unless you clarify.
By withholding comments which support your claims and instead baselessly accusing the commenter of a lack of experience, your comment detracts from rather than adds to the discussion.
