On one king quilt I kept track of time. I outlined each log of 56 log cabin blocks, at 8 hours per block. If I had stitched in the ditch, the time would have been about half, but that would still have been 200 hours!
The quilt on my bed this month was quilted in front of CNN during Desert Storm. Don't remember how many days, but it got done!
I don't keep track of the time any more (and don't hand quilt everything.)