A slow yes is worth more than a fast one. It means you checked.

A quick yes usually means the answer was decided before the question was understood. When someone takes time, they are checking their calendar, their money and their appetite for it, and the yes that comes back is one they can actually keep. Speed in agreement often signals politeness or avoidance rather than commitment.

Give your own yeses a little delay, even for small things. Say you will confirm tomorrow, then use the gap to check whether you want it or only wanted the conversation to end. Extend the same patience to other people, and trust the answers that took a while.