Hi All,
For those of you who don't follow the Poser forum, or missed my thread there, I did a little comparison test of rendering times between Carrara 5 Pro running two threads and Poser 7 running two threads. 
Okay, for the scene that I used go here: www.fotoonz.com  (Caboose) 
For the sake of expediency, I used a resolution of 800x618 for this test.

Now, Poser 6 won't render this scene at all, regardless of bucket size. 

Poser 7 took 2 minutes and 56 seconds.

Carrara 5 Pro took 1minute and 38 seconds. Using the TransPoser plugin.

At my usual final rendering resolution of 4000x3090, these numbers would be multiplied by at least 25. 

It might be interesting to try this same scene using the Native Importer, but I'm not sure I want to take the time. More 'toons to do!

Where Carrara REALLY shines in this comparison is when I tried a scene that contained a fish bowl with reflection and refraction turned on. P7 took four times as long as C5 Pro. 
So, I will continue to do almost all my final renderings in Carrara. I'm really looking forward to C6! I'd be much happier not to have to use Poser at all.