This story is believable.
That said, while Kiwis aren’t huge small talkers, they can be very talkative, even with perfect strangers, in quite a few settings. It just usually isn’t for the heck of it.
I’ve found Kiwis honest-to-God friendly and helpful, just not very boisterous and loud. Similar to Canadians actually. That’s why I love traveling from here in the US to Canada whenever I can; Canada reminds me somewhat of NZ. :)
Yeah. The MRT and its passengers aren’t loud. Customers at the hawker markets aren’t loud. The ferry passengers between Singapore and Indonesia aren’t loud. Speaking in generalities, of course, but Singapore just isn’t a loud, boisterous society.
Singaporeans themselves were friendly enough, given the chance. They’re just not extroverted.