[CentOS] RH developer toolset

I saw an article this morning about the RH developer toolset.
basically it includes a couple of packages like PHP python mysql (etc) that
are later packages than that included in the released version like a 6.4
for example.
So instead of php 5.3 with patches it would be php 5.4 and so on.

That is great for a couple packages - but what about more up to date
libraries like glib. 6.4 is way behind on glib. Like a couple years behind.

Are there any plans in the "toolset" to update core libraries also?

Thanks,

Jerry