First/short or later/longer?
When speaking at a conference and you get offered two possible speaking slots: early in the day and very short, and later in the day and a lot longer. Which one to take? Easy, the early/short one.
Attendance at conferences drops during the day, your audience is a lot bigger in the morning
When people see you speak (early) they are more likely to approach you later, (feedback about) your presentation is an ice breaker
In conferences, a really short speech is likely better than a long one. You are not here to close the deal, just to start more conversations. Your short speaker slot is a blessing.