All I know is he works for valve, he is not really the cool uncle that you see in memes that gives you beta products or anything like that, he is pretty awesome though, and we have similar interests so it's easier for me to communicate with him than other people.
The current released linux build of TF2 is a piece of shit, it's built with an ancient version some libraries that don't work in modern linux, on top of that it has flaws that make it run afoul of SELinux