Now seems like a good time to remind people about speedrun.com. I really want to thank Corruption for adding a link into the OP.
I would recommend anyone that is interested in speedrunning, whether its CoH speedrunning or just speedrunning in general, to take a look at the site and make an account. For CoH specifically, There are multiple categories set up, such as Solo and Master of runs, making it a little easier to see how fast a TF/Trial has been completed in different circumstances. Some of the people who have been posting times here have also started populating the different runs over there, but not everybody. This thread will always stay the main source of what the current fastest time for any given TF/Trial is, as not everyone will submit a run to speedrun.com. However, over there you will see the leaderboard for each TF/Trial, as well as being able to compare times for different team sizes. So if you like speedrunning, but dont quite have enough people to try for certain times, take a peek over there and maybe you can go after solo, or small team times.