Quote - Stupid question time:

With the V4 shapes is it possible to use V4 content such as clothes with Genesis in Poser?

Will the clothing behave the same way as using them on V4?

No, the shape doesn't give Genesis the V4 rigging. You would need to use DAZ Studio to AutoFit the clothes, then save as .duf to bring to Poser. Of course PhilC may be able to figure out a way to convert in Poser - I'm not sure how the imported figure will interact with Python. Dynamic clothes made for V4 should fit a morphed figure, of course.