There's no guarantee of larger clutches if you wait, no--of course not. But increased likelihood of it? That appears to be there. And that's worth it.

From what observations I've been hearing, females that start off laying small clutches are likely to keep laying small clutches--etc. And females first bred when they are small are much more likely to lay small clutches than those first bred when they are larger. Over the course of a female's life, if that's true by even one little egg, that adds up in a HUGE way.