[ExI] Gravity waves?

[Ben]

John Clark <johnkclark at gmail.com> wrote:
>> Gravity waves have just been detected in the variations of the
>> polarization of the microwave radiation from the Big Bang; and so ...

Shouldn't this be "gravity waves have been inferred from the detection 
of variations of the polarisation...", or "variations in the 
polarisation of microwave radiation is consistent with the existence of 
gravity waves...", etc.?

I'm still waiting for someone to /actually detect gravity waves/. I'm 
wondering why we can't seem to detect them directly, even though we can 
detect things as ghostly as neutrinos?

Ben Zaiboc