Does Windows 8.1 work properly on new (mid-2015) Macbook Pro?

According to this review, Windows 8.1 does not run well on the new (mid-2015) Macbook Pro:

http://www.notebookcheck.net/Apple-MacBook-Pro-Retina-15-Mid-2015-Review.144402. 0.html

They said they couldn't get all the drivers to install properly with Bootcamp, and that the keyboard and touchpad are not fully functional.

They also say Windows 8.1 doesn't work well with the Radeon R9 M370X graphics card:

The notebook switches to the more frugal graphics processor while idling, but unfortunately, this only works with OS X.

And:

Unfortunately, the MacBook Pro is affected by a very annoying problem when you use Windows, which results in frame rate drops during prolonged gaming sessions: The Radeon GPU cannot maintain its core clock of 800 MHz. The clock often fluctuates between 675 and 725 MHz, but occasionally drops to 400 MHz. The resulting stutters are very annoying, particularly when you play shooting games, and seem to be caused by thermal throttling when the core temperature reaches around 74 °C (~165 °F).

And:

While the 15-inch device is quite frugal with 6.0 to 13.3 watts while idling in OS X, the consumption dramatically explodes when you use the Microsoft operating system: 10.7 to 25.6 watts show that neither the deactivation of the Radeon GPU nor the various energy-saving features of the processor work properly. This is also the reason for the previously mentioned differences in terms of system noise and temperature development.

Is this review accurate? I have a new MBP scheduled for delivery tomorrow, but this has me wondering if I should return it and get a Dell XPS 15, since I will primarily be using it as a Windows machine.