Which Smartphone OS Do You Use For Banking?

According to the Commonwealth Bank, the figures are pretty one sided, but it raises the question as to whether you bank online on mobiles at all. I'd noted on the original story regarding the Commonwealth Bank's Kaching NFC service that it had opted to launch on iPhone first because that platform represented the lion's share of its netbank. Its slide on the evolution of its net banking service is naturally a little self-serving, but it does provide the details up nicely in visual form.

What's your take on this? A reflection of the Commonwealth bank's user base, the number of users who've taken up the Android Netbank App, or something else? [Commonwealth Bank]