Just thinking about the rubber band and rope stretch concept. I think what some guys experience, if mostly what they do is DdRT ands switch, is that when you take the same rope, (if it is rated for it) and use it SRT you get a lot more stretch. I have not seen data on this but if your weight is supported by two ropes or in this case the "doubled" rope (DdRT) the amount of weight applied for the stretch would be half, therefore, maybe half the stretch. So going from the same DdRT rope to using in SRT you feel maybe twice the stretch. This is probably obvious to experienced climbers but I have not read too much about this or the actual numbers when going from DdRT to SRT.
Maybe someone can enlighten me.
Food for thought also. I think once you are up in the tree and moving around working, you would want some stretch so if you take a little sink you don't get the shock loading you get from a static rope. For these reasons, I think there is some justification in ascending SRT with a static line but when you start working, use a more dynamic line whether you end up using the tail of your rope DdRT to move around or continue with the RW on the single line. Of course it all depends on the situation, how high is your TIP, how much will you be moving around in the tree, etc etc....