24. The article of manufacture of claim 23 , wherein each given colloquial-speaker vector of each respective set of colloquial-speaker vectors has an associated enriched transcription derived from a respective text string associated with a particular recorded colloquial speech utterance from which the given colloquial-speaker vector was extracted, and wherein replacing each colloquial-speaker vector of the respective set of colloquial-speaker vectors with the respective, optimally-matched reference-speaker vector comprises: for each given colloquial-speaker vector of the respective set of colloquial-speaker vectors that is replaced, retaining its associated enriched transcription.
24. The article of manufacture of claim 23 , wherein each given colloquial-speaker vector of each respective set of colloquial-speaker vectors has an associated enriched transcription derived from a respective text string associated with a particular recorded colloquial speech utterance from which the given colloquial-speaker vector was extracted, and wherein replacing each colloquial-speaker vector of the respective set of colloquial-speaker vectors with the respective, optimally-matched reference-speaker vector comprises: for each given colloquial-speaker vector of the respective set of colloquial-speaker vectors that is replaced, retaining its associated enriched transcription. 25. The article of manufacture of claim 24 , wherein aggregating the replaced colloquial-speaker vectors of all the respective sets of colloquial-speaker vectors into the aggregate set of conditioned speaker vectors comprises constructing a TTS system speech corpus that includes the replaced colloquial-speaker vectors of all the respective sets of colloquial-speaker vectors and the retained enriched transcriptions associated with each given colloquial-speaker vector that was replaced.