_at least_ fonts presented there look stunning on Linux (using Firefox). Not sure,why they won't look great on Windows though.
Linux's fontconfig allows for all sorts of configuration. Ubuntu, by default, probably has the nicest config. Otherwise, I personally turn off all hinting but leave subpixel rendering on. Brings it closer to what OSX does.
Personally, the best font rendering I've ever seen is on a high PPI Android phone. Most pages that are more than 2-3 paragraphs I forward to my phone for reading, since my desktop displays aren't that great.