Young Teen is what I'm going to start calling it. That's what I think we need for the Child > Teen gap.
The term Pre-Teen just sounds too much like they don't have any teen characteristics and while I would never say no to more life stages, I think we need a Young Teen life stage more than we need one that is essentially a slightly older Child. Plus I think some of the stuff people are asking for in Pre-Teen fits with Young Teens anyway.
Of course this is just one item on a long list of improvements that would be cool to see for life stages. :smile:
I think pretty much every existing stage other than toddler could do with a little more attention to their defining characteristics.