You dont have higher specs then him, his comment states that he has an Nvidia 7800GTX, and fast hard drives in a RAID configuration. You have a 7100 onboard chipset which is very weak. His video card is much more powerful then your onboard chipset, which is why he doesnt stutter.
Also you dont have 1.3GB memory on your chipset, you probably have 64MB of dedicated memory and it leaches the rest from your physical RAM.
And his CPU is more powerful as well.