During the concert on September 25th, 2011 the audience was invited to participate in a survey.
The question was "What would your preference be as regards performing repeats?"

The first quartet performed - Mozart - included all repeats in the menuetto and trio movement, but no repeats in the other three movements.   The second quartet performed - Grieg - included all repeats.

There were two checkboxes and a space for comments.  Responses were as follows:

"I would prefer not too many repeats"   -   3 votes
"I would prefer all repeats"   -   4 votes

Comments:
  "I fall asleep if the piece is too long."
  "My daughter once said to me, 'If it's not different, why repeat?'."
  "I like the repeats - helps develop the music.  Time is ok, worth it."
  "I love the repeats."
  "Just keep doing what you're doing.  It's wonderful!"
  "Musicians -- decision!  Duke it out!"
  "I prefer judicious use of repeats, not too long, not too few.  Ours is an impatient age with more stuff to do each day.  Mozart - the first movement did seem somewhat abbreviated."
  "Keep on arguing - you don't need us to tell you what you do so well!"
  "The menuetto & trio repeats were fine since I liked that movement quite a lot, especially hearing Sara's expertise exercised!"
  "2nd piece was fantastic!"

The result:
As well as the survey sheets submitted, we received various verbal comments, expressing a similar range of opinion.
Thankyou to everybody who participated in the survey!  We will continue to argue each case on its merits, with perhaps a bias towards including most repeats, especially the first repeat in sonata form first movements.