Btw, pushing shadows in LR/CR imho isn't really a substitute for +ev (with the adjustment brush or graduated filters) because it looks often artificial to me if shadows go over +50 in PV2012.
Agreed. I was just trying to see how much information is in there. The recovered part does look 'plasticy'
I think you could lift a LOT more than that. Try boosting the exposure slider by at least one stop, if not two. I push around my 7D shots a lot, sometimes a +80 shadow lift on top of a +1, +1.33, or +1.5 exposure lift (and usually some negative black shift to maintain contrast) when I botch a shot, and experience zero banding.
Thanks for the tip!