The problem with displaying uptime is that it can be taken the wrong way.
For example, if we take a server down for regularly short planned periods to perform security & maintenance, it will show a short periods which some user think shows instability.
Yet, if I display the long uptime of some of my KSpliced servers, some people think it shows that we don't patch our servers, so your damned if you do and your damned if you don't.
Obviously we have a 3rd party monitoring solution in place, and we can demonstrate uptime if we are asked, but I'm not sure I want to put it live for the reason's above.
Although I have to say that since we switched to cloudlinux our uptime is something I wouldn't have a problem with displaying if we so wished.