I'd echo what others have said about performance needing a kick up the rear, if the DSON Importer plugin's anything to go by... and if the performance there is anything to do with the current version of the new plugin framework within Poser.

 

However, with Reality 3 shaping up for release, and SM's clear focus on encouraging new Poser add-on development... this thread now further demonstrates this I think... I can't imagine our seeing improvement on the performance front, with forthcoming iterations of Poser, isn't likely?