Possibly, maybe even probably, at the moment the test case which is questioning the fairness of these charges is continuing as the banks go from court to court trying to find someone to agree with them, so far the have failed but the next stop is the House of Lords where they will be appealing to the likes of Sir Fred Goodwin and most of their major shareholders, not that I'm cynical or anything.
Seriously, it looks like eventually a decision will be made that bank charges are not fair and a rate will be set as a guide for an acceptable level, with credit cards, this was £12, I suspect it will be set higher for banks.
Depending on the wording of the OFT, you should then either be able to claim the difference between this new rate and what you have paid, or the full amount of past charges.
Timescale? I suspect we're still looking about 12 months - 2 years!!