It seems that it's the conventional practice to pronounce Turandot with its final t articulated. I know some people who don't. I got into it with a guy one time when I told him that every performance I went to had them pronouncing the t. He said every performance he heard had the t silent. I think he just had a hearing problem. Don't they always pronounce the t in modern performances? Should they? Apparently in the first performace with Toscanini and in early recordings they didn't. Some say it was Puccini’s intention that his opera be pronounced Turando.
Here's a blog with many responses: http://medicine-opera.com/2008/12/tu...without-the-t/