Only one not fooled it seems was Brian Ahern.
Perhaps more accurately: I gather that among LENR longtimers there were different levels of optimism, pessimism and skepticism. What optimism there was was due in part to the direct connection to Focardi and through him the indirect connection to Piantelli. There was a willingness among some to withhold judgment until adequate information was available to make an assessment, and, until then, scary tidbits that turned up here and there might be allowed as the result of possible quirks of character. The tests by Levi et al. provided additional grounds for optimism up until (but probably not including) the Lugano test, and after that, Parkhomov's and related reports.
It was in this context that there were few who had openly expressed a clear judgment on the matter one way or another.