acceptable to use $.event.add ?

acceptable to use $.event.add ?

Does anyone know if the $.event.add and $.event.remove functions in the jQuery core are intended to be used outside the core?  I realize I can accomplish the same thing with bind/unbind...

$(element).bind('eventName', handler);
$.event.add(element, 'eventName', handler);

However in some cases I have no need for the other things $(element) would provide.  If both statements above are exactly the same in terms of efficiency, or if the $.event object is not intended for use outside of the core, then I think I should just use $(element).bind.  But if using $.event provides even the slightest performance benefit and it's considered a stable part of the jQuery core API, then I might as well use it, no?