Earlier quoted context omitted.
Linux will probably run fine on those specs, remember Windows has a ton of overhead in terms of RAM and storage.
Windows will run amazing on these and all things considered storage isn't an issue. They have really optimized for ultra small devices and id be willing to bet windows 8.1 on these would be super awesome actually. My daughters tablet with similar specs but only 1gb of ram is smooth as can be.
How much memory does Mac OS X Yosemite need?
How much engineering effort is spent on optimization and improving performance, as opposed to changing the look'n'feel and adding consumer-focused features?