By Lenn Thompson, Editor-in-Chief I'm not sure if it can be attributed to Finger Lakes Editor Evan Dawson's Four Stages of Riesling or not, but most people I know strongly prefer either dry OR semi-dry styles of riesling. When Nena and I first visited the Finger Lakes a couple years ago we ended up taking a bottle of dry and a bottle of semi-dry from just about every tasting room we visited — one that I liked better (dry) and one that Nena preferred (semi-dry) For me though, it's not really about residual sugar, it's about acidity. If a wine…