Is it possible that the timing on your contact with them made a difference? It seems that NASA/NHTSA concluded in 2011 that it was a mechanical defect, but research concluding in 2013 showed that it was totally possible to have been caused by the software.
At least according to the summary based on sources used for Wikipedia:
https://en.wikipedia.org/wiki/2009%E2%80%9311_Toyota_vehicle...