Also who are these users?
We get feedback on IRC, twitter, mailing lists, blogs, and on conferences in real life. I don't know what all of those people do with Perl 6, only some. Some of them write IRC bots, others write Perl 6 code that refactors their java code, again others manipulate CAD file with Perl 6, for their own consulting business.
Some of those projects are developed and maintained over years, and make their owners money. IMHO that's "serious".
Anyway, are you trying to imply that we shouldn't listen to user feedback because there are no facebook-scale Perl 6 installation? That it's OK to be annoyingly slow because we don't have a huge user base? And instead listen to a rather aggressive, anonymous poster on perlmonks?
Anyway, I'm afraid I'm wasting my time here. If we implement new features, people complain that rakudo is unusable because it's too slow and buggy; if we spend time optimizing it, people complain that we should make it feature complete first. Whatever we do, we'll get hate and pushback from random people on the Internet, so there's nothing left to do but do what we think is best.