My stat of 25-35% was based on people who both do the dilution method correctly but might add a little too much volume and those who do the method incorrectly like using water instead of sports drinks or not taking the Tums/Rolaids. I wouldn't say they don't use any countermeasures but rather it includes some who don't use the countermeasures properly and some that do and a few who just drink as much water as they can.