Hardware Overview:
Machine Name
tMac
Machine Model
tMacBookPro2,2
Processor Name
tIntel Core 2 Duo
Processor Speed
t2.16 GHz
Number Of Processors
t1
Total Number Of Cores
t2
L2 Cache (per processor)
t4 MB
Memory
t1 GB
Bus Speed
t667 MHz
ATI Radeon X1600:
Chipset Model
tATY,RadeonX1600
Type
tDisplay
Bus
tPCIe
VRAM (Total)
t128 MB
Just got it today. I actually bought the $2500 2.16 Core Duo with 1GB of RAM and the 256MB VRAM like 4 days ago, The day before the Core 2's came out... Absolutely horrible timing on my part... Anyway, So I used that extensively until I was able to go back and exchange it for the Core 2 of the same price. But after using the Core Duo for those 3 days, I got a feel for what I really used it for. So I got the lower end Core 2 and kept the $250 price difference for potential upgrades to this one.
And boy am I blown away... Since I'd already gotten used to the Core Duo, I wasn't expecting much of a speed bump to the 2.16 Core 2 Duo. But Yikes!
I'm starting to wonder if there was something wrong with my World of Warcraft install on the Core Duo, because with all the settings turned up minus AA on OS X 10.4.8, I was getting 35-50FPS with a little bit of lagging loading new areas. Which I thought was respectable. And to be honest, with this Core 2 Duo's VRAM being half of the Core Duo, I expected about the same performance, if not worse.
Boy was I wrong. I'm now getting anywhere from 90 to 160fps using the EXACT same graphics settings. Averaging at about 120-130fps. I traveled from the Undercity to Orgrimmar and beyond. I even went on a raid. The FPS NEVER dipped below 85fps on max settings at 1440x900. It's not even a fresh install. I just copied the WoW folder and prefs over from the Core Duo to the Core 2 Duo.
I got a 2nd gig of RAM for this one but haven't installed it yet. So I can't wait to see what it'll do then. Is the GPU clocked higher or something? Because This just doesn't seem like it could be right.
As for general usage, The fan is just a tad louder than the Core Duo's. But the system feels cooler to the touch under stress. No detectable whining or "mooing". the default colorsync seems to be better tuned. The keys actually feel better. I had to press down a little harder than I was used to on the Core Duo keyboard to get it to register. This seems to be fixed. The DVD drive is much quieter than the previous PowerBook G4 and Macbook drives. And the UI is "teh snappy".
Over all, I'm very pleased with the Core 2 Duo Macbook Pro. Definitely worth the asking price.
I had about 3 weeks of use and 3 weeks of down time because of it. But it did get fixed and that I am happy about (not to mention the track pad died too). 
