So let me make sure I understand what you are trying to say. You're saying is that the HIGH end available now SHOULD be faster than the BASE model available later? If that is what you are trying to say, it's kinda apples to oranges and that is a terrible argument to say that performance won't be effected. You have to compare evenly across the board (Base to Base and High end to High end). Do you honestly think that the high end available for the same price soon will not be faster than what is offered now? Also, you're forgetting that they will probably upgrade other components as well. If they even increase the battery life an hour for example, then the new MBP >> current MBP in my book, but I seriously doubt that in an EVEN comparison, the upgraded MBP would not be a better performer. The only way I could imagine Apple not improving performance in comparable MBPs is if it increases battery life or some other beneficial trade-off.
I didn't say performance wouldn't be [a]ffected. I said that Core iX isn't a game-changer. Which it isn't, given that you can get an equal level of performance now.
The initial Arrandale sports no battery increase, so that argument goes out the window. Hard drivers aren't any different now. The Arrandale caches are wimpy. Etc.
My point -- still standing as tall as it did before -- is that the lack of Core iX isn't a "blocker" for anyone but the high-end customers right now. If you want the same kind of performance you'll get with Arrandale in a stock configuration, you can go out today and buy it.
So there is an improvement then. And looking at the results closer it is fairly substantial. Just under 20% overall yes, but that is dragged down by E-Learning and General Productivity which are nothing huge considering. The 27% increase (rounding to nearest decimal) in Video Creation and 29% in 3D are impressive however. Follow that with a 38-43% improvement in Cinebench and 26-45% for H.264 encoding and you can't say that that isn't substantial. To the average guy who wants to write his screenplay yeah C2D is fine but cumon, anyone who uses the Macbook Pro for what it's really targeted for will reap the benefits of Nehalem, saying otherwise is pure denial.
Again, no one is denying that there is improvement. It's just not night-and-day. It's also kind of unfair (and inaccurate) for you to use the phrase, "anyone who uses the Macbook Pro for what it's really targeted." It's targeted for higher-end customers of Apple products. That doesn't mean people who are often CPU bound. I assure you that as someone who has spent tens of thousands over the last 10 years on Apple laptops that I am among the target customers, yet I'm not CPU-bound most of the time.