On Tuesday, February 2, 2016 at 11:31:22 PM UTC-5, Surge wrote:
Where I fly only low position aerotows are performed and even in turbulent conditions with glass gliders, rope slack doesn't seem to be much of a problem.

Are high position aerotows more prone to developing rope slack?

I would say yes, it's a lot easier to let the nose drop and accelerate, thus causing slack.
In low tow, an easy way to get slack is to turn inside the towplane.

At our field, almost all our tows are low tow. I mostly do high tow at contests, training and checkrides.