Does anyone know if there are variations in the size of SETI WU's?  

I run both Folding@home and SETI on my comp.  Folding indicates on
their client the size of the WU being processed as well as the
percentage which makes it easy to see why some units take longer than
others.  All I have been able to discern from SETI is the percentage
of progress.  If there is a variance in size from one unit to the next
I am hoping that would explain why my last 2 SETI WU's took, on
average, 107+ hours.  The one I am currently processing is at about
50% in under 9 hours....  As it's such a large discrepancy I was
wondering if there is something else I should be checking out or
possibly re-installing the client in case it might be corrupted.  Any
information or thoughts on this would be very welcome.  I'm running a
733 celeron here, Win 98SE with 128 MB ram.

Sincerely;
Ravenmadtaoist