On Fox News I think I heard them say Trans Ocean had verified the success
As long as the public understands that 'success' means the wellhead is holding, and the pumping has begun, which has reduced the flow of oil and gas to the surface. It will still take time to get the proper amount of mud in the pipe, and then they can inject the 'cement'. Then the cement must set up. This could still take 2 more days, to end all leaks on the wellhead and riser.