Malt_Man - I found that with my rectangle cooler that the batch sparge worked a lot better. I am still new at this so take this with a grain of salt but I would say try it and see what happens. I found I was getting about 0.010 better with the batch method.
So, I have not heard of this process before. Do you just pull a sample of wort and add a few drops of iodine to that? I would interested in trying this on my next batch.
I am crushing it myself at the Northern Brewer store in Milwaukee. It did sit in the bag for about 18 hours before I brewed it so I am not sure if that had anything to do with it.
So I am still somewhat new to all grain brewing (maybe 10 batches in) and I am trying to brew an Imperial IPA with a targeted OG of 1.077. This was my second attempt at this beer and again I missed my OG by a mile. For the second time in a row my OG came in around 1.052. With the other beers...