Update README.md

Author: gonzaloserrano

README.md

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 # GolangBCN Meetup Group talks
+
 Submit your talk or propose a topic creating an Issue
 
 # Talk Standards
 
-* Talks are ~45 minutes including Q & A.
-* Two talks per meetup.
-* We have an international audience, so we prefer talks in English.
+* Talks should be ~30 minutes long, demo included, with a ~5 minutes Q & A session.
+* Between 2 and 3 talks per meetup, depending on its length.
+* We have an international audience, so we prefer talks in English (but it's not a stopper)
 
 # How to submit a talk
 
 You can submit your talk [Creating a new issue](https://github.com/GolangBCN/talks/issues/new?title=Talk%20-%20Title).
-