In a Google Q&A, John Mueller mentioned that “Overall, our systems treat new gTLDs like other gTLDs (like .com & .org). Keywords in a TLD do not give any advantage or disadvantage in search.”
It means that website with a new generic TLDs like .ONL, .BLACK, .CASA rank as well as .com or .org in Google search results. This is the official Google statement. We have done some experiments and we confirm that any new generic domain TLDs perform well. The domain names with a new generic TLD are visited as often as the older ones. They also get indexed as well as .com. Then, we saw that they receive as much traffic
Since .com websites are here since a long time, it is difficult to compare .com websites to websites with a new generic TLDs.