They certainly have. The amounts withdrawn and deposited are enough to make solid connections between addresses on the blockchain. With this information it's possible to make a lot of associations between addresses you couldn't before knowing this information. From what I've read it gives the amount, account hash and the time, that's more than enough to uniquely identify them on the blockchain.

For people who had frequently reused publicly known addresses it's as good as putting their account name on the records.

I guess people didn't learn from the infamous AOL search data release.

You're right, I didn't think about the connection between exact BTC amounts and those being visible on the blockchain in plain sight.