Whilst I think that may generally hold true, one also needs to look
at the following;
Is it the Stable/ regular rider for the carraige
Is the Jock a better class Jock than its previous riders
Has it previously won with this jock on board
If not previously a winner is this the regular or better class jock
Whilst all the above may apply there a numerous occassions when
the rider is also an apprentice, again is it the regular rider or better
class app.
One could go on and on. Maybe it is each to his own