I think that you can attribute the change in taste to the actual quality of the fruit itself. One year you had a better crop than another.
Just pouring hot water would probably only have a minimal affect on the taste as BK alluded. Now if you boilde the fruit for 20+ minutes then you would have affected the taste, odor etc.
I'm sure it will be goof wine though!
Relax, don't worry etc. and so on.
Primaries: Old Ale, Barleywine, ESB, Scottish 80/.
Secondaries: Lime Wine, Strawberry-Banana Mead, Carmenere (from 144 lbs of grapes!), Engl. Barleywine, Modded JOAM, Concord Grape Pyment.
Kegs: Choc/Coffee Stout, Saison, Dry Stout.
Bottles: Belgian Str. Dark, Dubbel, Cider X 2, Modded JOAM, RJS Pinot Noir, RJS Aussie Cab. Sauv.
Coming soon: Blueberry Mead.