im not to sure on the lack of bait theory, if its singles the fish has to decide to take it or leave it, if it spooks while taking it, then is that not a rig problem
the extra pressure is something where id expect singles to work better than heavy baiting,
the is a story i heard about kingfisher lake.
the fish were coming out less and less, boats the were the norm and lots of bait was going in, the fish were puting on weight but they not getting caught. then the buzz spread around about how well zigs and singles were pulling out the lumps and this started to become the norm, untill the weights started dropping. tony started getting a little edgy and it was talked about banning zigs. but he didnt and from what i see on my last visit the bait is going in again,only more of a spread then tight.