Are you connected to the Intel 6G SATA ports (SATA3 0/1) or to the Marvell (GSATA3 6/7/8)? The Marvell/Realtek controllers tend to suck, you will generally have better performance out of intels 3G ports than some aftermarket 6G ports. Also, can you post som CrystalDiskMark and AS-SSD scores, they will give us more to go on than the WEI numbers.
That looks right for a 120GB SandForce powered SSD using IMFT flash on random data benchmarks.
Your WEI storage score may be low, and if it bothers you, you can use WINSAT from a prompt to do indexes. You can even just run the disk test if you like.