Well, for most people on most topics it is infeasible to evaluate who is right, period. At the end of the day, some effort is usually required to obtain reliable information. Even surveys of expert opinion may be difficult to conduct if the field is narrow and non-"traditional". As for whatever few specialists there may be in Singularity issues, I think you expect too little of them if you don't think Eliezer currently has enough status to expect rebuttals.