Yes. I ran the numbers quickly and there have been 1,717 signups since we migrated to Discourse on 1 August 2016. A daily average of 7.6 with a standard deviation of 3.6 signups tells me that at any given day, we can expect at least one new Forumosan or 14 new users to join.
Now, is this trend improving? Yes. The average daily signup rate for the past 100 days (since 6 Dec) is 8 with an incrementally better standard deviation of 3.4, and the average daily signups for the past 30 days (since St Valentine's Day) is up to 8.6 with an even tighter standard deviation of 2.7.
Applying the same crude analysis to posting numbers:
Since the migration on 1 Aug, there have been 20,586 posts made on Forumosa. This is a daily average of 91 posts with a standard deviation of 40 per day -- so on any given day, expect there to be anywhere from 10 posts (probably Sundays) to 170 posts (probably a Monday).
The trend has improved markedly. In the past 100 days (since the first week of December), daily average posts improved to 98 per day. In the past 50 days (last week of January), average posting jumped to 108 per day. And in the past month, 112 posts are made on average every day with a tighter standard deviation of 35 posts (or ranging from 42 to 181 posts per day)