I think people actually think that doubling the amount of cores actually equates to double the performance, judging by some reactions.
A quad core A9 would have been nice, but perhaps it wouldn't be the best investment of money into designing and manufacturing a new chip with a larger die, when that could be put into the Apple A6, which will have the much faster Cortex-A15.
Now, being disappointed that it's not an A15 is more reasonable, but still very improbable given that it only just recently started sampling (going by the Exynos 5250). The tradeoff with using an A15 in the iPad HD would have been you waiting until Summer to get it, instead of in March. There are no manufacturers that have even started mass producing the A15.
A quad core A9 would have been nice, but perhaps it wouldn't be the best investment of money into designing and manufacturing a new chip with a larger die, when that could be put into the Apple A6, which will have the much faster Cortex-A15.
Now, being disappointed that it's not an A15 is more reasonable, but still very improbable given that it only just recently started sampling (going by the Exynos 5250). The tradeoff with using an A15 in the iPad HD would have been you waiting until Summer to get it, instead of in March. There are no manufacturers that have even started mass producing the A15.