I wasn't clear - the fast old chicks may race SW3 or P123 rather than the 50+ - meaning, some people compete in category, others in masters, it's not consistent. Anyway, I'm looking for the "right" race to be in, which i think is probably either the 3s or the 50+, and I can never tell in advance which will be the bigger and/or harder field. This time the winning masters time was faster than the winning cat 3 time and the last-place masters time was also faster than the last-place cat 3 time. That's somewhat unusual - but i think the faster 3's raced in the P123 today because there was a big $ payout. Lots of category options!
Anyway i'm pretty happy with the race.