I think your conclusions in the article are fair. I think the title on HN is misleading because it's a quantitive issue.

V8 GC is a well known concern in the Node community, but it's still performing well enough that Node is considerably faster than traditional servers (like Apache). The fact that Ringo is also faster doesn't make V8 "not ready" it just means it could be improved.

If I wanted to be contentious I could suggest that "Hacker News comments confirms that RingoJS may not be ready for developers" because the author likes taking pot shots at other frameworks. But that would be petty, wouldn't it?