Where are you going with this? Are you saying that after 13 Seconds AC should have been/was higher than what is being clainmed here, or are you sugesting that AC took a long time to react? Or something else?
13 seconds seems reasonable between "go around" being said and UA001 commenting; given the exchange after the go around was initiated between AC and ATC, and then a pause to check that there was nothing else to be said between AC and ATC by ua001 to not step on AC/ATC.