One thing has been overlooked here. The Footy show is up in QLD once a year or so, therefore people would travel to be part of it and it would have been a major event for the place.
The Central Coast is a short train ride to watch it in Sydney, I certainly know a few people on the Coast who have travelled up to go to the footy show. Therefore when it is put in Gosford it wouldn't generate the same excitment. Add to the fact the Central Coast would have a fair population of Bears fans who wouldn't dream or watching that Manly nitwit Fatty and I can see why there would be a difference in crowd.
I can't see how you would judge something on a Footy show crowd, the show is crap and barely mentions footy so why would a league enthusiast go?