If you're implying that it has to do with the lack of visible scores, I'd point out that I think that the comments are still ordered by score, even if they aren't necessarily displayed.
If it's just because of the sheer number of comments attached to the C# specific parent, I can't remember a time when a really popular comment didn't take up a larger share of space as more comments logically take up more space.
I mean, there was the pre-pagination era, where you could just keep scrolling down, but that was also the era of HN crashing all too frequently.
I suppose it IS a fair point though, especially considering that C# is (by my quick once over) only the fourth most popular language, and easily represents the most popular discussion on the topic.
Also, looking through the additional pages, it seems as though there aren't many other comments that even have children, much less anywhere close to the same discussion space.