They're 'better' in tone, but for many videos the comments come across as very sycophantic which is a bit tiresome. That's not always the case though, so probably depends to some extent on the channel's community.
The video often is amazing! The talent is many times top-notch! But I pine for the days of Slashdot, with their categorized moderation. You could hide all the “+5 funny” comments and only see the interesting or insightful ones.
In the case of machining videos, I want to see how others solved an issue the video dealt with. Or alternative tools that could do the same thing cheaper. These comments do exist, but are often buried. And Google only lets you see additional comments in little dribbles.