Actually, and not to diminish your questions, but I have some questions regarding the cut advisor as well

:
The cut advisor uses the AVERAGES of the pavilion, crown and table dimensions, because I believe that is what a sarin report spits out - so if the averages fall within a good range, it spits out good results.
1) How much do variances (or the min to max for each number) affect these results?
2) Is this something we should pay attention to? What would be considered significant/material variances?
I realize that ultimately you have to take a look at the stone, but when purchasing over the internet, that is not always feasible. It would be nice to have some rules of thumb.