The TRUTH about the Birth Control Commision

There is evidence (as noted above) that Ottaviani influenced Paul VI.  So much the better.

There is no evidence, though, that Ottaviani threw a tantrum and threatened schism.  That would have been pretty pointless.  Whom would he have taken into schism with him? 

The only "tantrum" I see here is from someone who didn't get what they wanted, by seeing the majority report's conclusions become part of the Church's magisterial teaching.  

If maintaining the Church's traditional teaching on the matter is "regressive", then not just Paul VI, but John Paul II, Benedict XVI, (thus far) Pope Francis, and the Catechism are all "regressive" as well.