1. A method of evaluating the quality of voice input recognition by a voice portal, said method comprising the steps of: extracting a current grammar from the voice portal; generating a test input for the current grammar, the test input including a test pattern and a set of active grammars for the current grammar; providing the test input to the voice portal; analyzing the test pattern with respect to the set of active grammars with a speech recognition engine in the voice portal; and deriving a measure of quality of recognition for the current grammar.