You know, on the topic of whether the whites showing up fairly quickly the next day suggests they (or others) might possibly be prone to head in and 'check out' people (on surf boards, kayaks, etc...), I'm a tad concerned.
A lot of people who swim, surf, bob around or whatever aren't 'shark savy,' and if they saw a 7' Great White swim circles around them (much less whap'em with a tail or something), they would panic, possibly start thrashing around and screaming, etc...
I wonder what this pair of young whites would've done had a surfer started thrashing around a lot?
I know the proneness to prey on humans of white sharks has been grossly exaggerated, but they are pretty much an apex predator (if you ignore orcas), they doubtless do get hungry, and occasionally one kills somebody. If the population is growing drastically, and they're going to be checking people out, it could be a concern. I'm not fishing for paranoia or melodrama; I'd just like to know if thrashing around is apt to make a Great White attack.
Richard.