Bloomberg News either misspoke or spreading misleading rumors. The Stress Tests Results have not been delayed. They Fed has already stated that the results would be released during the week of May 4th. The WSJ (and others) had reported this past Monday (and maybe even earlier) on just that information.
From the WSJ on April 27th (Monday): "While the Fed initially planned to release the results of the stress tests on May 4, the government says the results will be released sometime that week."