It does almost make you wish there was a universal versioning system everyone would use. Sometimes you see a 0.1 that has more content than a triple A title, other times it'll literally be the first initial/demo release. Rarely you'll even see something in it's 0.1 iteration but then be tagged as "completed".
I think Nick Young speaks for the average user when he goes:
I started looking at file sizes instead when determining how much content there is in a game. My sanity sent me a thank-you letter shortly after.