I've said this before, the Star Wars fans who are just entering their teens today will take another 5-10 years to get their voices heard in this discussion. Although Lucas was over-generalizing when he mentioned at Cannes that there are two groups of Star Wars fans, one under 25 which liked the prequels more and those over 25 which liked the OT more, there's plenty of anecdotal evidence that he's actually right, and he was probably just parroting some marketing study on his fanbase he has read.
Lots of kids who grew up with the phantom menace view the Star Wars films in a very different light. There is no OT/PT divide and some of them quite like the prequels. RotS will be their ESB and we'll have debates about this forever.