Some of the wines that display Long Island’s true nature–terroir if you will–are actually red blends, not the varietal merlots that are often lauded as the region’s best. I know, shocking. I should be strung up for suggesting such a thing. Of course not all blends are created equal. There are more than enough wines that fall into the "meritage" catetory that seem more like a way to use up extra lots of lesser reds than anything else. Theresa Dilworth, co-owner of and head winemaker for Comtesse Therese isn’t making one of those. This blandly named but far-from-bland blend of…