I think not.
From working at a bank a few years ago (no, not Westpac), the ones in control of picking technology platforms are generally fairly conservative and untechnical. They are ripe for marketers, which is how we were flogged such rubbish as Tandem NonStop (the hardware's good but the OS is shite) and Microsoft (ummm...)
They won't switch from IIS unless they are forced to.
Wade.
"All around me are nothing but fakes
Come with me on the biggest fake of all!"