The recently introduced so-called "gag law" seems to effectively make it illegal to protest about evictions anymore, so there may be more Spaniards getting the heave-ho, but the bad publicity surrounding evictions may have made the banks a bit reticent about kicking folk out of their homes. Foreigners, in particular holiday home owners, however, are an easy target, since they are less likely to generate the same kind of media fuss (especially if they are not even in Spain at the time of repossession)
That said, it stands to reason that many of the bank properties were owned by foreigners, since the bulk of their stock is on urbanisations in the middle of nowhere where ordinary Spaniards would never want to live, built during the boom and sold to unsuspecting "investors" with promises of infrastructure developments etc. that never materialised.
Just out of interest, are you exclusively looking at bank properties? From what I can tell, they are not cheap (more importantly, often not good value, for the above mentioned reasons). Banks have pretty much balanced their books and are no longer under any great pressure to shift their property portfolios, so if you're looking for a bargain, you're probably barking up the wrong tree.