Defining "Fast"

Over the last two years, I've been a member of a few different training groups. Whether they be local or online or whatever, the discussion always comes up about what constitutes "fast." Fast running, fast biking, fast swimming, ANYTHING fast. There's the argument that the true definition of fast is the elite athlete's paces they happen to be holding at that time. Whether it's 4:48 per mile pace for a marathon (course record at Boston) or a 27 MPH average bike speed over a 113 mile stage of a pro bike race. The people that can achieve those speeds are the epitomy of fast, for sure, but does that define fast for me? I'd say it defines what you may REALLY REALLY LIKE to be able to do, but it isn't very realistic unless you happen to win the lottery and can dedicate your days to training under a coach or are already super talented.
I've always subscribed to the theory that fast is relative to the individual. For example, if you're a 12 minute miler that is just getting started on a structured training plan, fast for you is probably somewhere in the 9-10 minute mile range. Meaning if you can achieve that pace at the end of your plan, you're going "fast" compared to you're starting point. 6 flat pace just isn't realistic for that individual at that time. In order to remain motivated, that person should be focusing on defining their personal "fast" and really disregard other people's definition of the word. I'm not saying it isn't possible for a 12 minute miler to one day be a sub 5 minute miler. I would love to train with someone who demonstrates that level of commitment and planning. It would trully be an inspiration to witness that transformation!
Does this line of thinking mean you should only train with people who share your ability and never challenge yourself by joining a group with more talented/fit athletes? NO!! It simply describes what I think is a healthy and sustainable approach to training and goal setting for the average athlete. It is essential that you expose yourself to better and better competition as you improve for several reasons. It teaches you there is always someone "faster," it helps you expand your personal limits to points you never thought possible on your own, and it keeps your ego in check. That goes for not only beginners, but also for those who routinely pound on their local training circle. They should make it a point to hit a group ride/run with more talented athletes to avoid stagnating or becoming "that guy" in their regular group. Getting your ass handed to you every so often is healthy and helps you RE-define your own "fast."
Keep that in mind next time you are setting goals or comparing your performance to someone else's. You're "fast" based on your criteria, not what others impose on you.