"Is white ash a sign of quality?
This myth was promoted by many of the new cigar smokers in the cigar boom of the nineteen nineties. The fact is the color of the ash has no relevance to the quality of the cigar. The color of the ash is a direct result of the composition of the soil from which the tobaccos where grown. White ash simply means that the soil from where the tobacco was grown was high in phosphorus and calcium. Dominican, Honduran and Cuban soils are generally low in phosphorous and calcium and higher in magnesium. Magnesium tends to offer a sweeter smoke, with a darker and flakier ash. In most cases, gray ash will indicate healthier tobacco. Ash that is too white or too black is generally less desirable."
So here we have a published article that dispels a myth (white ash being better),then stating that in most cases gray ash indicated healthier tobacco,and then stating that ash that is too white or black is undesirable.It also states that it is a "Fact" that ash color has no relevance to quality.
This sounds more like a political finding than anything factual ,relevant,or quotable.
"So I guess my question is: Does a gray ash or a white ash cigar signal the chances of a better cigar"?
You need to find a better indicator to judge cigar quality.........