With all the legal wrangling going on in the US, I thought the bank was going to release the information. This does not seem to be the case.
I am pretty sure that no matter what the IRS does, UBS will not give out any information. If it does, their clients will withdrawal all their money from their bank.
Therefore, it is in the best interest of the bank to keep jerking the IRS around. Their massive profits depend on it.