This is a claim that Rossi himself was making on his blog a while ago (i.e., more than a year ago). I get the feeling that quite a bit of what we see in Menichella's article comes pretty directly from Rossi.
As you can see by Para's post above, Rossi only hinted at the Uppsalla professors building a replication device and running an experiment with non-phase-change water calorimetry. Rossi didn't claim that the results were positive. So it seems unlikely that the physicist Mario Menichella's claim that the Uppsalla scientists have replicated (without publishing the results) the Rossi effect came from Rossi himself.