Not really. Replication is where you do exactly the same experiment as someone else and see if you get the same result or not. Nobody has tried this with Calhoun's universe experiments (they would probably cost too much, be hard to get through IRB as it could be argued that it is too cruel to the rats, and wouldn't be really fashionable these days as they are seen as part of the out of favor "behaviorism" movement). Simply saying that nobody has seen this behavior in nature or among humans isn't at all the same thing as replication.
Gwern notes Calhoun hardly piblished anything formal (much less peer-reviewed) about his research - mostly interpretation-heavy summaries of what he wanted to emphasize. Not enough detail rigorously 'replicate'!
But Gwern does mention a few followups that tried similar setups - and didn't really see the same major takeaways. So "nobody has tried" isn't really accurate. Nobody has succeeded!
