I don't really abide by those compatibility systems. I think that they can provide some sort of insight into what a person's preferences are in a mate and who they do well with. If someone is a bit on the shy side, these tools can certainly help to indicate that.
However, I don't think they really accurately gauge the type of person that will be the perfect match for any individual. Everything depends on how well an individual knows them self and understands their own needs.
If you meet someone online or on a blind dates, here are some tips to play it safe.