TL;DR: EA Global meetings have a default time, but you can skip to the goal of the meeting and avoid the urge to fill the entire allotted time.
Background
I had a meeting with Lizka. It was 7 minutes. In the remaining time, we grabbed food, and decided to write this post together.
What was in our meeting?
Me: “How about adding [some mysterious feature] to nudge people to write summaries for their posts?”
Lizka:

Me: “We have time left, wanna write a post called EAG Meetings Can Be Short?”
Lizka: “Can we have an image in there?”
Main Takeaways
EAG meetings can be short, have images, meta jokes, and have a concrete result, such as something new posted to the Forum.
Related Reading
This actually happened to me as well!
Both parties agreed the meeting's goals were accomplished and we continued with our EAG