... because he's a man, duh!

Recently in an Olympic distance triathlon, I passed this (very fit) 50 or 60 something guy that came in while I was exiting transition. Apparently he was chasing me that entire time. Glad to know I was his motivation.

They have an uphill battle to catch you next year anyway. You keep training, they of course minimize the amount of training they have to do because a) you're a girl, and b) they are estimating based on this year's time, and you still kick butt. Win-win for you!