Thanks to Ben's hard work we now have a nice website for displaying player's stats and leaderboards. At this moment we only have a speed run leaderboard shown on the image above. It puts players who complete a map faster than others in the top of the list. Note that at this moment it's not cheat protected so don't take it too seriously.
The leaderboard list page contains official campaigns and challenges plus top 25 workshop campaigns by playtime this week. There is also a separate leaderboard for each mission and each challenge.
The front page displays global stats for all the time or any of the last 60 days.
At the achievements page you can see all your locked and unlocked achievements and the requirements to achieve them. It also shows your best time for speed run achievements.
Player profile page shows lifetime statistics like the most played official missions, various stats in the upper left.
Player profile also shows mission/difficulty success rate, most chosen weapons/marines.
Weapon stats can be viewed as global stats or per-player stats. Global stats can be viewed for all time or any of the last 60 days. Weapon stats include things like damage blocked with electric armor and burning marines saved by freeze grenades. Deathmatch stats are in parentheses.
Feel free to check this website out and let us know what do you think about it in the comments section or in the discussions section.