looks to me like they are testing ranking based on not just what KWs are IN the title tag and domain, but by which words are NOT. ex. Far Cry 3 vs Far Cry 3 Review
I'm seeing something similar. I have a page with "How To Make Widgets" as title. The URL is how_to_make_widgets.htm
I do not rank at all for "How To Make Widgets". I Do rank with that page for "widgets making" (8th place for 60,500,000 results) "making widgets" (11th place for 128,000,000 results) "how make widgets" (13th place for 520.000.000 results)
It looks like Google thinks I'm a sort of spammer because the title and URL actually reflect exactly what the page is about.