Neonchameleon
Legend
From people'es discussion that an effect can vary per invocation, I have to disagree. The keyword assignment may be eager, but the in-game presentation is lazy.
Look at how magical missiles can be presented and how a player's whim can vary those representations. Look at how any of the Fighter powers represent a variety of maneouvres/special circumstances/reactions as opposed to a particular thing. Classic lazy binding.
Lazy/eager or hard/soft? I'd say 4e has under your definition eager binding but soft binding. It's not that 4e's binding is less eager, but I'm allowed to rebind (and can have a lot of fun doing so) should I so wish.