Yoon Jong-shin
Upon its release, "Talk About S" received generally positive reviews from music critics. Jakob Dorof from Pitchfork Media called the extended play "excellent", further praising Gain for using her solo career "to test the limits of both Korea's mainstream music and morals". He also picked "Tinkerbell" as part of the "20 Essential K-Pop Songs" list. Writing for "HelloKPop", writer Jung Bae described the release as "stronger", but didn't "come close to matching the brilliance" of her debut effort. He described the album's title track as "irresistibly charming" and "genuine", while praising the performance of both Gain and Yoon Jong-shin on "The Gaze" and the "frenetic rhythm" of "Tinkerbell". Writer Hwang Sun-eob from "IZM" also praised the release, citing it as a "fair" showcase of Gain's musical flexibility, further growing away from the comparison to singer-songwriter IU.