I can say that in the local area this is totally true
I am the only person ever seen in this bit of the road who cycles
and I am Pisces
Hence all cyclists in this area are Pisces.
Point proven
As an aside - a friend of my Mum's was very into fortune telling
When she was in her 20s she went to a fortune teller who told her that the true love of her life would be tall and dark
Turned out that all her long term relationships were with tall dark men!!!
so there you are !!
of course, the fact that, after seeing the fortune teller, she would never go out with a bloke who was tall and dark - because there was clearly no future in it - may be relevant!
Someone could start a poll - but the replies will be people who self select - but the results could be
a) interesting
b) statistically pointless
c) prove nothing
but I'd just go with (a)