I think they have started to attend the 'proper' mod rallies too Eden -if you remember the flak that appeared on the letters pages of a well known magazine after a review of the previous Brighton mod rally.
Frankly I still feel most go to IOW as they know they won't 'cut it' at Brighton or don't want to stick to a dress code.
I think I'm with most here though -anti -plastics and anti -'scooter fans' who don't even have a bloody scooter at all!