Well, I've gone crazy

[One_Hertz]

Try disabling every cache option (except disk cache), and rerun the IOMeter. The random writes should arrive at the right spot then at least, not sure of the reads. (and you don't really need the read-ahead on these).
~12K random writes @4K block = ~50MB/s, presuming 10 sec run time = ~500MB - just about right for the cache to influence it.

It can't add latency, otherwise the queue = 32 random reads would not surpass the 12K mark.

Exactly what I was already going to do when I got home. Great minds think alike

But idk about the latency part. HDtach/HDtune showed 0.2ms. These drives should have 0.075ms.

Edit: IOMeter was running ~25min for all benchies.

Edit2: Turned off all caching and random write IOPS are 1800 for queue of 1 and 4400 for queue of 32. Random read IOPS did not change. Will test on ICH9R later...