what motherboard are u using? different chipsets react differently to ssd (amd vs intel). and in between intel also got alot of different chipsets, most notably the fastest is intel's ich10.

you wont be able to get exactly the same speeds as other people due to a lot of factors. cpu, mobo, the southbridge, third party sata controller, etc.

and moreover some review sites will use high end cpu like 990x and oc'ed it like hell to do the benchmark, so their values will obviously be higher.