As someone who feels pretty much the same as graumoewe, it's not that I doubt people are sincere when they praise something, but I have a really hard time believing they like everything they praise wholeheartedly and don't have anything they dislike about it or think could have been done better. Maybe I'm just picky, but it's really foreign to me. So while I'm thrilled to get positive fb, I do always wonder what they left out out of politeness.