It is a bit odd, people usually don't bother to review something unless they really dislike it. (Unless they are product shills for one company or another )
I know I'm very vocal about things I'm not pleased with and not nearly as vocal about things I like. Though I'll recommend things I enjoy to others via word of mouth/posting, which is only natural but I'll rarely if ever take the time to review my liked products on a vendors web page.
Wow, shocking! Something on the internet being made up! That's why most people ignore reviews on the seller's website and come to places like this for opinions. Although I find that most big internet sellers are too big to police their reviews and there are plenty of negative ones (most detail suppliers are small in comparison to Amazon, Newegg, etc.)