Is this a custom style or just a modified default?

[Svoboda]

I'm creating a set of conference forums and came across this XF site. I like the utter simplicity of it so I'd like to duplicate it. Just curious if this is a custom style or if they just modified the default theme.

http://www.a10talk.com/forums

 

[PerfectInsanity]

All the node icons/gradients are from the styles/xenforo directory on the site. So I'm guessing it's a modified default style.

 

[DarkGizmo]

Slightly modified default.

 

[Mike Edge]

Looks very nice though. They did a good job.