swimming

I swam again for the first time in at least two weeks. I tested my time for the 400 meters: 11:46. I told the triathlon people that my time would be 12:30. My swimming & tri buddy, K, came in at 12:26 today. I am now debating: do I tell the triathlon people my new time, guaranteeing that I will start slightly earlier than K and swim between people who are about my speed? Or do I stay in my current bracket, guaranteeing that I will be able to stay with K the whole way and do the entire triathlon with her? There are pros and cons either way, but if I change the time, then I will probably be slightly ahead of K for the whole triathlon (well, until she zips past me and leaves me in a cloud of dust during the biking part).