I boiled them exactly as directed, covered, then put them in ice water for 20 minutes and sure enough, just like "they" say, there was no weird greenish-gray at the edge of the cooked yolk.
As for taste, they turned out great, says hubby and daughter, with one minor exception: slightly too much salt in the finished product. Note: Son and Mommy did not partake in the deviled egg feast. This is the problem with serving food that has not been taste-tested before hitting the table, and it is a big problem! It tasted like a salt lick and I had no idea because I never even tasted it myself. Ewww...deviled eggs? No thanks! I mentioned in a previous post - the husband is my best food sampler and yet I did not utilize him this time, to my own demise. Although he ate them just fine. Poor guy!