Exactly correct. The last press release indicated that it detected THC and some metabolites - my initial understanding was it would only detect THC. Their approach seems to be to try and extrapolate the "decay" based on concentrations of THC and the select metabolites, to give a time frame when the person ingested the THC. My concern with this is that if a person is a heavy user they will have more metabolites (residuals) in their system so the correlation may be skewed. By sticking with THC alone it's a number that can be evauated against a legal limit - easy to pass or fail without ambiguity.
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