I'd think a reason for quick wear out may be swap memory. I've never put a swap file/partition on mine.
That's very interesting. I've had a swap file on all of my SSD systems. What makes you think that could be a culprit?
I have a swap partition on my SSD but I also have swappiness=0, so that it only writes to disk if there's actual memory pressure.
More info: http://en.wikipedia.org/wiki/Wear_leveling