It reads to me like the manager got the right people involved, got them collaboratively analyzing the problem to the point that they were able to identify the c

It reads to me like the manager got the right people involved, got them collaboratively analyzing the problem to the point that they were able to identify the core issue, got them to find a solution to that issue and then got them to implement it. So a multi-team effort addressed something that was probably not an immediate priority for any team involved, since it's not like it was on anybody's roadmap, and got what sounds like a significant issue resolved in 3-4 weeks. Based on the way this is discussed plus a look at the about section of the website, it seems like it happened at a large organization, so that's not exactly slow. The manager in question sounds like they're crushing it to me.