Did you follow the link to the Cornell paper?
http://arxiv.org/abs/1305.3913
http://arxiv.org/pdf/1305.3913v3
Seems legit to me.
As to why they didn’t dunk it in water, I guess for the same reason you don’t dunk FF1 in water to see if it works. It’s an electrical device, it would need proper insulation.
Can anyone go into more detail as to why they think Rossi is a fraud? In the mean time I will ask them about a water dunk test at their forum http://www.lenr-forum.com/forum/.
:edit :
hmm on further investigation it seems its a fraud.
the Cornell university emblem duped me. Didn’t know fraud papers could get in that archive.