When checking on a discussion over approaching punditry, I noticed that the data dump (at least the one for Meta) seems to be missing quite a few comments. The most recent data dump includes 33256 comments. Considering that we're approaching comment ID 100000 on meta, I doubt that the whole rest was deleted. I didn't run around hunting for lots of examples, but comment 80017 is one, at least.
These missing comments will be in the next data dump.