The reality is that the RBA and domestic affairs have minimal impact on the dollar, it's what happens to other economies that see the dollar in demand or forgotten about. I think the last time our dollar was significantly impacted by local events was when some dude from Bankstown mentioned some recession we had to have.
The exception is the RBA has a major impact with its ability to lower interest rates. When they get halved over a year or 2, there is no conceivable way for it to be as attractive to foreign investors, or even local investors, as it was. Now they are at an all-time low and the dollar has done nothing but free fall since April. I think those price movements have far more impact on the dollar than anything that is said by Glenn Stevens, except to the extent that what is said affects the likelihood of future moves.