These reviews are really terrible. Whoever wrote them has a tenuous grasp of how tuned pipes work, and they cite no sources for this data.
Sign your name when you talk Bret, it helps to see who says what.
Anyways, I translated em and thx for the compliment. I'd love to see you stick your neck out for the wiki.
This is a summary. A short list of what does what. It has been composed of 100's of user reviews on Puchforum.net. It is not meant as a full review with exact technical data, it is only an indicator. If you're not happy with it, go test all pipes yourself and make a better one then.