The abundant, large pickerel in Nock is, unfortunately, news of the past. That ended sometime in the decade between 1995 and 2005.
As for abundant muskellunge, that began in the early two-thousand teens yrs.
Don’t be surprised to catch a striper there when fishing for muskies.
Based on an obvious fin clip from the Nock muskellunge population evaluation studies, a Nock source muskellunge was captured by an angler from the Delaware as far downstream as Washington Crossing. No doubt that escapees from Nock contribute to the lower Delaware population and that contribution may be greater now than a few decades ago since the Nock pop is now much larger. Additionally, fishing for escapees of various species has always been productive just below the Nock dam.