The day an unbiased top singer or music director has a word for a contestant outside the show is the day you realize that something may be special about the contestant. Anything that is said in the show or by paid celebrities is as fake as MBD's and table-climbing.
Till then enjoy the effort by all and hope for the best for their future. None of the contestants here have received any praise from outsiders that are documented or made outside the show. Till that happens whatever we hear is what the channel wants us to hear. So all of them are equally good or bad at this stage of their singing career. We should not get carried away.