Really need an accurate thermometer to say for sure. We are only talking about a very small temperature range. With all the variation in thermometers that I have seen I would not rely on anyone's estimate of what they may have incubated at.
Here is a very interesting article http://www.scientificamerican.com/ar...ation-reptiles
I have a post on my forum http://davidperkinsreptiles.com/foru....php?f=8&t=171