I think this falls under the same reason most people don't like to post about a negative experience with a vender, designer, affiliate, etc. They don't want to be seen as causing drama or being a negative person or knit picking.

Then there are the people that take up a lot of our time asking questions and we give our honest feedback, only to be presented with a finished product that has NOTHING to do with all the recommendations and advice we gave.

When I ask a question in the forum I want total honesty, even if it's something I wasn't expecting. At the end of the day it's important to give an honest opinion as that's what will truly help someone, whether they take it in or not.