"Here" we can see the long term effects of tillage vs continuous no-till, and these are just spots that needed leveling for whatever reason and rarely, if ever, whole fields.  This makes it easier to see the difference throughout the growing season and in the fall.  This also leads to a greater chance of rutting another fall since the soil structure is gone, starting a vicious cycle.  We'd rather deal with light rutting for a few seasons till it levels back out with planter passes and freeze/thaw cycles vs making it worse in a wet fall.  As dry as we are right now the spots we hit with a disc, albeit very lightly are easily visible a quarter mile away.  We have a field that hasn't been tilled since it was put in pasture in '73 and was no-tilled sometime in the 80s when it went back to row crops.  It yields as well or better than anything else and has very good soil structure and is very mellow.  For us, for the droughts like we're going through now, and for the fuel and labor savings, I can honestly say no-till is the only way to consistently raise good crops and stay in business.  Other areas may be drastically different, but we've proven that no-till is perfect for our area over about 40 years of practice and adapting.