to me jquery feels less heavy-handed about the abstraction. every abstraction has a price, i tend to avoid them unless they have a demonstrated value. to me, OO has no demonstrated value
to be honest, i see the basis of objective-j born from some notion that apple does things right so naturally we all want to do things they way they do...but objective c sucks (having coded in it), and i have no idea why people would want to muck up another stack by pasting objective c onto it