You guys are very confused when it comes to the Apple adapters.
They EITHER use Aetheros or Broadcom. The latter being most common among the ones built in 2008 and up.
Secondly, why would they be using an Intel adapter? Yes, we all know those are limited, but the chipset doesn't matter as long as you can take advantage of that 40Hz channel width, which I explained already.
The only Intel thing in those computers is the CPU. Not even the mainboard chipset is Intel. It's Nvidia.
Your MBP, if you just got it uses Broadcom. It's something under the Apple OS which prevents that from running at the higher speeds. Bootcamp and XP work fine, and as intended. Forcing it to the 5GHz range, and attaining the 40Hz will get those speeds. Nothing more, nothing less.
You can set your router to force the 40Hz all you want, but it's the Apple OS which blocks it on the 2.4GHz band.
I suggest you do some research and find out for yourself.
There are no planned patches for this as it's been brought up to PM at Apple.