You also have the issue where one person can do 3,4,5 for their 3 tables....but the person with 3 4 person tables still only gets one entry, so that's just another version of the skew.This should be multiple choice, I play in two groups and run about three.
Also- do you count remote players as "at the table"?
Assuming the answer is yes, my groups' sizes are: 8, 4, 10, 9, 5.
hehe way way way too soon to draw any conclusions. That number of votes is so low, that the margin for error wipes out any conclusions you could draw.