Final answer:
The detail that foretells the daughter's potential recital troubles in "Two Kinds" is her lack of emotional connection with music, indicating a performance that may be technically skilled but hollow and uninspired.
Step-by-step explanation:
The detail from "Two Kinds" that suggests the daughter might not perform well at her recital is the underlying tension and lack of true passion for the music she is expected to play. A prediction can be made based on the character's relation to her performance art which, as the text points out, may lack sincerity and feeling. It's implied that she has not necessarily connected emotionally with her music, which is essential for a compelling performance.
This is reflected in another narrative, where a character is described as being "all style, without any sincerity," suggesting that despite technical skill, a lack of emotional connection to the art can result in a hollow performance. Moreover, an artist's true engagement with their craft often predicts their success in a performance situation, and if they are playing or participating for reasons other than love of the art, it may lead to an uninspired performance.