I skimmed your blog posts and logs, so apologies if I missed it. How many problems or exercises did you work through in the book? Did people put in any additional time individually between sessions?
I can't speak for all participants of these meetings and I haven't kept an exact count of the problems I solved but I believe I must have solved somewhere between 160 to 200 problems from the exercises in the book. See also https://news.ycombinator.com/item?id=34908191 for more details on this topic.