If the listed requirements are the minimums, why bother listing all of the operating systems and all of the versions of IIS? You show 2008, 2008r2, 2012 but that leads one to believe that 2012 r2 isn't supported yet as someone felt compelled to include 2008r2 on the list. Why not just say 2008+ then...
We know that architecturally the platforms can change from version to version and as you suggest 8.5 is locked down even further. I've done a test install and out of the box it doesn't work. the site loads, but for some reason I don't seem to get any CSS code loading. So while R2 and 8.5 might be supported, does someone have a document outlining the tweaks required to get it working?
Supported Operating Systems
Windows Vista, Windows 7, Windows 8, Windows 2008, Windows 2008 R2, Windows 2012
Web Server
Microsoft IIS 7.0, 7.5, 8.0
Database Server
Microsoft SQL Server 2008, Microsoft SQL Server 2008 Express, Microsoft SQL Server 2008 R2, Microsoft SQL Server 2008 Express R2, Microsoft SQL Server 2012, Microsoft SQL Server 2012 Express, Microsoft SQL Server Azure
.NET Framework
4.0, 4.5