Just found an article stating that 50% of D/N ODIs are won batting first, 45% second with the other 5% washed out/tied etc.
Both Australia and NZ however have more wins bowling first (all the other countries except England win more batting first). However as you rightly say @Stuart-Wallace every single country has a high percentage of choosing to bat first if winning the toss.
If Oz bat first, do we expect Finch to suddenly find form or is an early wicket quite likely?
Interestingly i think both sides have tremendous bowling attacks, but are maybe a touch light in batters? Off I go to investigate recent batter form...