@Kindaspongey, Amazon.com usually uses exactly the same sample that the publisher provides them in the site's "Look Inside" feature. Occasionally, there's a difference, but not often.
Of course, the publisher's site gives other information as well, but Amazon really does help the reader to decide for him or her self.
... from what I am gathering reading book reviews on Amazon and these forums, ...
Just as a reminder, I think it is often a good idea to look at a sample of a book at a publisher's site, in order to get an idea about whether or not a book is something you are likely to want to work on at this point.