Medium straw color. Youthful nose - very mineral with ethereal floral aromas of honeysuckle. Slightly off-dry on the palate. Medium(+) acidity. Medium alcohol and body. Pronounced intensity of floral and pear flavors. Very spicy. Medium to long length with a finish of ripe apple flavors.
Wines emanating from red slate ("roter Schiefer") are supposed to mature more slowly. If that is the case I wonder how this wine will evolve over the next ten to fifteen years. There is an astonishing amount of minerality and spice in this wine (at QbA-level!). The intensity of spice may be a bit unusual for a Mosel Riesling. Busch's Vom Roten Schiefer 2005 is anything else but a light fruity wine. It is very concentrated, without feeling heavy. Still, it is not a wine for the faint-hearted.
Update 13 February 2011: The color has turned golden and the aroma has turned into stone fruit and buckwheat honey. Very spicy. So is the palate. Spicy fruit and minerals, in perfect harmony. The "Vom Roten Schiefer" is perfect to drink now. Beautiful QbA Riesling.