Apple did not state performance improvement with new Intel HD3000 chipset (found on entry-level new MacBook Pro models) over the previous NVidia 320M, and only stated that performance is up to 3 times higher with the new ATI Radeon HD 6750M dedicated card (found in the high-end model – 1 Gb of DDR5 -, the Radeon HD 6490M with 256 Mb of DDR3 found in middle model not being as fast) compared with previous Nvidia GeForce GT 330M dedicated card found on older middle and high-end MacBook Pro. Moreover the new middle and high-end models use a quad core processor (Core i7 at 2,2 Ghz) instead of the dual core i5 processor (2,53 Ghz or 2,66 Ghz) found on the olders Macbook Pro.
The new entry-level MacBook Pro isn’t then faster for gaming than the previous one (Intel HD3000 chipset ranks 154th and Nvidia GeForce 320M 129th) or the June 2010 mac mini. However the new Core i5 based entry-level Macbook Pro (2,3 Ghz) brings Turbo Boost 2.0 and Hyper threading (compared with previous 2,4 Ghz Core2 Duo).
It may then be faster with single threaded applications (the single activated core speeds up to 3,4 Ghz) or with applications that use at least 4 threads (performance will be similar with two-threaded applications). Result will then rely on Grand Central enhancements in MacOSX Lion.