Yea, I think Microsoft knocked it down "for now". The BIOS settings can be controlled by the operating system and even if you got to the BIOS and changed it, once you boot the system, the operating system will knock it back.
Why they are doing that is a very, very good question. I have the desktop 4200U and it can create some heat when Turbo Boost kicks in. That may be one reason and when it does, if my computer was on a battery, chances are that it would only last a couple
of hours. That is a guess since it is a desktop.
The laptops with the 4200U are not having a problem at all. They do put out some heat but not really hot enough to remove from your lap.
Some time in the future, Microsoft could release a firmware update to release the throttling of the CPU. There could be even another issue that we don't know about.
As for waiting for a release of an official statement, don't hold your breath. Microsoft doesn't release any information on anything. Take a look at the technical specifications. Those are about as generic as you can get.
It should still be a good machine.
I also have the i7 desktop and that puppy is "FAST"! Running Linux on it for about a month and then will put Windows 8.1 on it later. I might hold out and wait for Windows 9 Beta to come out if Microsoft releases it at the end of the year. That particular
CPU generates enough heat that the CPU cooling fan is not enough. So, the tablet version should have a beefed up heat sink within the chassis. I would say, for a tablet, that one would be worth it. There would not be a tablet on Earth that could compete
with its performance.