I don't see how you can read a topic, enter a reply and go to the next and read the topic and post a reply, all in 1 minute. Hell I wouldn't mind if it were 2 minutes per post. Putting the 1 min delay is actually great to get rid of some pesky spammers who come on from time to time, I remember the early days of the forum, we sometimes got flooded with spammers who posted 20 topics in like a minute.
The issue may seem like a problem and I understand the plight but there are so many places you can chat besides here that can be easily set up.
The problem with not having a wait would allow a new account or even a hacked account to spam fake message as honeypots or links that some how effect the person clicking it in one way or another. I rather be over protective than let the free for all start. If you look at how bad the affilliate spam is for Stake, a site we all know about, you get a sense of how bad the problem could be in the message land.
Or even winning players being lit up with begging messages.