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Closest I can think of, though perhaps a little archaic: "Harumph, you're quick on the uptake I take it." But, like DPT, I would be more inclined to keep it out of dialogue tags.
Answer
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/48082 License name: CC BY-SA 4.0 License URL: https://creativecommons.org/licenses/by-sa/4.0/