The whole bottle neck thing...with a short race course (some of them are about 5-6 km loops, so less than 4miles) and there is bound to be some spot where there is a bit of a bottleneck, and a few times, yes i can let one guy go but when TEN say "oh and me too" this completely stops my race. Argh!
BUT if they wait literally less than 10 seconds, a spot usually opens up. This past race i got a little agressive, and maybe that's just what i need to do. Hold my line until i am darn good and ready to let them go. I pay the same fees they do. So just because they are men or elite doens't make them more important than me. hmmf.