Did you read the article? The guy I was responding to was making the claim that the IGP was gonna suck yet the article clearly stated otherwise.
Low setting overall differences from the 320M to SB IGP:
+3.47
Medium setting overall differences from the 320M to SB IGP:
-1.7
Net result in favor of SB IGP over 320M:
+1.77
I'd like to point out that not only was the SB IGP backed up by a quad core processor in those tests but the clock speed of the SB IGP in that model is clocked at 650 MHz while the one that would go into the 13" MBP would only be clocked at 500 MHz. You're leaving out a lot of important details.