Yes this just happened. A well known investor in Twitter, Fred Wilson of Union Square Ventures, replied to a journalist’s query and alluded to his belief that Twitter is in fact a profitable company.
Interestingly Pascale-Emmanuel Gobry writing for Business Insider had speculated that Twitter was profitable as early as June of 2011. The deputy editor of that publication followed up with similar assertions in August of 2012. However, Fred Wilson’s exchange with Chris O’brien of The Los Angeles Times appears to be the first quasi-confirmation from someone with insider knowledge of the company’s finances and operations.