Yes, another annoying stresstest done to proof that we need bigger blocks to protect against blockchain spam. They do this since yesterday.
For referenceI've been watching this tx for a while, and I'm inclined to think now that the delay isn't a result of the spam (the fee here is 0.0009).
Actually, for a short while after this was broadcast, blocktrail was claiming this was an orphaned chain - and given that bitfinex appear to spend their outputs before they're confirmed, I wonder did they do an unintentional double spend?
There's a lot of money involved here anyway, so I'm confident there'll be a happy ending. (my withdrawal is only a very small part of this)