>>With that, maybe I need to do a couple identical brews and really focus on the effeciency difference in squeezing and dripping.
I wouldnt even bother. Squeezing gets you a maybe a couple more points of sugar. I do it because the bag is in front of me after its dripped, and I have gloves, so I might as well squeeze. But there is not going to be too big a difference.
I'd like to point out that soaking the dripped bag (i.e. sparging it) in a pot of hot water, then redrip drying it (and maybe squeezing too
) can get you additional sugar. This will be more noticeable (i.e. worthwhile) for higher gravity beers). I think you will get several points more sugar this way, than putting that water in your original mash.