I baked two sourdough loaves yesterday, using my recently acquired, and fed KAF starter (reported to come from starter that began 250 years ago in New England).
the bread is the best sourdough I've ever made, and perfect for sandwiches. I followed the KAF recipe that came with the starter, except for to changes. I had the starter in the fridge, and just used one coup of it, but did not throw out a cup, and refresh the starter before using it in this batch. Also, in the deep south, it is not possible to let a sponge or the dough rise in a room at 68°–70° F. I couldn't afford the power bill if I kept my house tht cool in the sumer. Actual room temperature was more like 78°. So, the sponge reached its time for overnight refrigeration in less than the anticipated 5 hours (it was more like 3 hours), and likewise, the next day, the dough, and then the loaves did not need as much time to rise as anticipated.
A photo of the bread and the recipe are here: http://jeffgrillsblog.blogspot.com/2010/08/kaf-rustic-sourdough_26.html