OK, yeah.. found the setting 
These are the default values.
@jacob.salmela, do you think we need to change them to be a bit more relaxed? Or (like me) do you think that the limit is fair enough for a new account within the first 24 hours of existence?
Edit:
Some discussion on the topic here:
https://meta.discourse.org/t/why-is-there-a-topic-reply-limit-for-new-users/11513/12