Duffy's regret came in response to a blistering quote from Nest CEO Tony Fadell, who told The Information as part of a lengthy Nest exposé that "A lot of the [Dropcam] employees were not as good as we hoped ... unfortunately it wasn't a very experienced team."
The Information story centers around Nest's recent product and management struggles, including several delayed launches and employee turnover.
Duffy calls Fadell's jab "blatant scapegoating" and "insulting to the team," in a post on Medium.
He also hints that Dropcam's revenue was larger than smart-thermostat company Nest's. When Google parent company Alphabet released its Q4 earnings earlier this year, it reported $448 million in revenue for its "Other Bets" category, which includes subsidiaries like Nest, its hardware lab X, and its high-speed-internet service Fiber.
Duffy writes: "[I]f you knew what percentage of all of Alphabet's 'other bets' revenue was brought in by the relatively tiny 100-person Dropcam team that Fadell derides, Nest itself would not look good in comparison."
He also wrote this on Twitter after the earnings:
Thought for a second that Alphabet had released Dropcam's revenue. Then I saw the operating losses and figured it out! "Other Bets" ;)-; gduffy (@gduffy) February 2, 2016