No IE6 won't be around forever, but if, in 2014, they can directly upgrade to IE10, say, then they will have avoided going IE6->IE8->IE10 and thus have saved the cost of an upgrade.
Makes sense to me.
Makes sense to me.
Small steps. Regularly taken.
Large banks are having a hard enough time ditching it and they have a clear motivation to do so to aid competitive edges.
That said, I still don't agree with using ie6.