Yes, I have something positive to mention:-
Poser 7 does not crash as frequently as Poser 6;
Poser 7 renders faster for me than Poser 6 does;
Poser 7 library is a bit more efficient to use than the Poser 6 one - but not by very much.  I still prefer using PRPC and Advance Library in combination to find and load my 3D content.

Eternal Hobbyist