Have you looked at the photos in this article and noticed a real problem? They all demonstrate low grout joints which do not meet the tile industry standards. To meet these standards, the grout must adequately fill the space which obviously these examples do not.
And yet, when the person who took these photos shared them with his builder on the job site, the builder did not believe that any standards existed or that there were any organizations that develop them.
Have you found yourself in a similar situation?
If yes, here's how to deal with low grout joints and understand tile installation standards.