Well, the consensus at a recent Napa Valley Vineyard Tech group meeting I attended was that because of the long cool growing season the quality of this year's vintage was spectacular with extraordinary flavor and colors in early white and red varieties. The September heat wave and rain appeared to be the turning point of the 2000 harvest. After the rain and heatwave the grapes went flat with little improvement in flavor and sugars.
Flavors seem to have washed out.
The September heat wave also resulted in spotty cases of sunburn on exposed clusters but the scariest point of this year's harvest was the late season rain. Those grapes that came in before the rain were of very high quality. Rain always causes tremendous panic since we never know the how long it will last or whether it will cause bunch rot. Select picking salvaged most of the late crop. Happily a miracle happened and the rains abated so those farmers who were patient were highly rewarded.