really?  mine have always been faster in Blender.  that said, settings can be tricky.  when i decided to make my scale more true to match the Blender/Poser difference (according to Poser's measurements, not any of the various rulers), i went from scaling up by 10 to scaling up by 2.5.  i found that i had to drastically change my collision distance settings.  also, in  my experience, Blender's cloth is for perfectly thin objects rather than anything with thickness (that seems to need soft body treatment).  most frustrating of all, i haven't been able to affect stretching much at all.  i can make cloth stiffer but not flexible without stretching.  that all said, i've usually had it perform better than Poser and more quickly.