I got the impression from the article that these weren't review drives. So the WA should be typical of what a regular user would see if they used it as an OS drive.

Thankfully one of the unwritten policies at AnandTech is to actually use anything we recommend. If we're going to suggest you spend your money on something, we're going to use it ourselves. Not in testbeds, but in primary systems. Within the company we have 5 SandForce drives deployed in real, every day systems. The longest of which has been running, without TRIM, for the past eight months at between 90 and 100% of its capacity.
http://www.anandtech.com/show/4159/o...t-sf2500-ssd/2

You're right about it being a good indicator of worst-case durability, though, and we could still extrapolate about more ideal situations with more compressible data from this.