https://forums.macrumors.com/threads/1102579/
It loses about 150 points to the GT330, but it's still in the same ball park figure, which is pretty darn impressive for an on-board Intel gpu.
It loses about 150 points to the 320M. Not the 330M- the 330 is not mentioned anywhere in the test in the post you linked to.
Both the 320M and HD3000 are integrated GPUs and the tests were performed in OS X with Apple's highly optimised drivers so not
quite as impressive as you think
Maybe with well developed drivers it can keep up, but in reality, for gaming in Windows (where the graphics really matter), the Intel drivers are basically useless while nVidia has extremely finely tweaked drivers.
Case-in-point:
I had a 13" Pro (has since been returned)- 2.7GHz i7, 4GB RAM, 256GB SSD, HD3000 graphics. Windows 7 Ultimate with the default Boot Camp Intel graphics drivers.
Still have my 11" Air- 1.6GHz C2D, 4GB RAM, 128GB SSD, 320M. Windows 7 Ultimate with the latest nVidia graphics drivers from laptopvideo2go.
Test was Call of Duty: Modern Warfare 2, native res, ultra [high] settings, both plugged in and the High Performance power management profile selected.
Both had nothing else running other than a stock copy of Windows.
The Pro achieved around 20 fps while the Air achieved 30+ fps.
These numbers carried over to several special ops missions so it's not just because nothing was happening on the screen.
I was extremely surprised, seeing as how the SB i7 was benchmarked to be around 2x faster than the Core 2's and I really did think that the processor would make up for what the graphics lacked. Still, real world results don't lie.
I don't doubt that the HD3000 can perform similar to the 320M if you're in OS X with the highly optimized drivers from Apple. For many users it matters most in Windows for gaming though and that's where the pathetic Intel drivers fall flat on its face.